Description of problem:
If try to use oo-app-idle without any pamameters added, following error would be shown:
/usr/sbin/oo-app-idle:33:in `join': can't convert nil into String (TypeError)
from /usr/sbin/oo-app-idle:33:in `<main>'
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Run "oo-app-idle" on instance
Error is shown as mentioned in description.
Help content is shown instead of the error.
Added a warning message. The pull request will go out later after stg cut.
Usage: ./oo-app-idle [UUID] [DAYS]
It's fixed and verified on devenv_2603, warning message is shown as below:
Usage: /usr/sbin/oo-app-idle [UUID] [DAYS]