Adding chmod command to make extracted files writable for oc rsh

[dhirajsb]

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[dhirajsb]

@rhuss I can't remember if there is a CI job to update upstream images. If not, can you please kick off a build for this change?

[rhuss]

Actually images are automatically build and pushed to Docker hub by a circleci job. However, there is is an error in the Dockerfile since some time, which prevents the build from suceeding -->

chmod: cannot access '/home/jboss': No such file or directory

I guess this is related to #114 , so we should fix this first (and make the build job more robust to better fail when the Docker build fails)

[vorburger]

@dhirajsb as @rhuss says we shold not update upstream images until #113 is closed - I'm on it.