[IMPR] Check for all modules which are needed by a script
[IMPR] Check for all modules which are needed by a script

This patch enables checking for all required modules which
are needed by a script for a give Python release. This
ensures that the package has to be updated if necessary
but always run a script with -help option.

Change-Id: I201d05f147abd0bb2bd552586a351af0fc606124

wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core