Commandline-Parameters don't expand maven-expressions

**Environment**:
Hosted Gitlab 11.10 with Docker-Runner

- *Jib version:* 1.8.0
- *Build tool:* Maven 3.5.4
- *OS:* alpine 3.9

**Description of the issue**:
When using JIB only via commandline (no changes in POM), maven-Expressions are not evaluated.
This feature would be really helpfull, to write the artifact name or version into the generated Docker-Image.
```
mvn compile com.google.cloud.tools:jib-maven-plugin:1.8.0:build \
-Djib.from.image=${CI_REGISTRY}/infra/jdk8/jre \
-Djib.to.image=$CI_REGISTRY_IMAGE/$CI_COMMIT_REF_NAME \
-Djib.to.tags=$CI_COMMIT_SHORT_SHA,\${project.version} \
-Djib.useOnlyProjectCache=true \
-Djib.container.creationTime=USE_CURRENT_TIMESTAMP
```
**Expected behavior**:
I expect the Build to produce the tags
- `latest`
- Value of $CI_COMMIT_SHORT_SHA (short git commit hash)
- value of `project.version` from the POM.

**Steps to reproduce**:

1. Set up a Maven-Project without JIB-Module
2. Call Maven with JIB-Commandline
3. Pass a Maven-Expression to any JIB-Parameter
`-Djib.to.tags=$CI_COMMIT_SHORT_SHA,\${project.version}` or
`-Djib.to.tags=$CI_COMMIT_SHORT_SHA,'${project.version}'`

**Log output**:
```
[ERROR] Failed to execute goal com.google.cloud.tools:jib-maven-plugin:1.8.0:build (default-cli) on project XXX: Execution default-cli of goal com.google.cloud.tools:jib-maven-plugin:1.8.0:build failed: invalid tag '${project.version}' -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.google.cloud.tools:jib-maven-plugin:1.8.0:build (default-cli) on project digioss-apigw: Execution default-cli of goal com.google.cloud.tools:jib-maven-plugin:1.8.0:build failed: invalid tag '${project.version}'
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:954)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal com.google.cloud.tools:jib-maven-plugin:1.8.0:build failed: invalid tag '${project.version}'
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:954)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.IllegalArgumentException: invalid tag '${project.version}'
at com.google.common.base.Preconditions.checkArgument (Preconditions.java:217)
at com.google.cloud.tools.jib.api.Containerizer.withAdditionalTag (Containerizer.java:159)
at java.lang.Iterable.forEach (Iterable.java:75)
at com.google.cloud.tools.jib.plugins.common.PluginConfigurationProcessor.configureContainerizer (PluginConfigurationProcessor.java:705)
at com.google.cloud.tools.jib.plugins.common.PluginConfigurationProcessor.processCommonConfiguration (PluginConfigurationProcessor.java:301)
at com.google.cloud.tools.jib.plugins.common.PluginConfigurationProcessor.createJibBuildRunnerForRegistryImage (PluginConfigurationProcessor.java:174)
at com.google.cloud.tools.jib.maven.BuildImageMojo.execute (BuildImageMojo.java:93)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:954)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
```