can't run gradlew on ubuntu 16

I'm trying to update Vagrant process in openwhisk core repo and trying to build the CLI for all platforms

I git clone this repo and then try to run gradle commands I get the same error
```
vagrant@ubuntu-xenial:~/openwhisk-cli$ ./gradlew compile

FAILURE: Build failed with an exception.

* What went wrong:
Could not create service of type ScriptPluginFactory using BuildScopeServices.createScriptPluginFactory().
> Could not create service of type CrossBuildFileHashCache using BuildSessionScopeServices.createCrossBuildFileHashCache().

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

BUILD FAILED in 0s
vagrant@ubuntu-xenial:~/openwhisk-cli$
```