Script to delete an old HDP stack version - BUG

As per the Jira https://issues.apache.org/jira/browse/AMBARI-18435 an API call to remove older versions was developed but its having issue.

ambari-server/src/main/resources/custom_actions/scripts/remove_previous_stacks.py [line: 67]

Execute(('rm', '-f', stack_root + version), sudo=True)

It will not delete the directory as there is no such directory, it should be:

Execute(('rm', '-f', stack_root +'/'+ version), sudo=True)