SonarQube: java not found

Hi, I've built the image as shown on sonarqube Readme file and uploaded to GCR to make available for cloud builds. On the console, after executing `gcloud builds submit . --config=cloudbuild.yaml` command, there's an output that it's inflating java:

`inflating: /opt/sonar-scanner-3.2.0.1227-linux/jre/bin/java`

After that, image is correctly uploaded and tagged at GCR, but when automatic build runs cloudbuild.yaml file of the project, there's an error:

`/opt/sonar-scanner-3.2.0.1227-linux/bin/sonar-scanner: exec: line 59: /opt/sonar-scanner-3.2.0.1227-linux/jre/bin/java: not found`

## Affected builder image
gcr.io/cloud-builders-community/sonarqube

## Expected Behavior
SonarQube scan the project.

## Actual Behavior
SonarQube shows an error when tries to use java although seems to be there when image is built.

## Steps to Reproduce the Problem

1. Create image and upload to the CGR
2. Add sonarqube scan step at project cloudbuild.xml
3. Run the build.

## Additional Info