Add original requirement when converting using py2rpm

Output the original requirement a rpm requirement is
being created for and use this original requirement
output to make sure all the requirements that are
being output in rpm form actually match the ones that
were requested (and blowup if this does not happen).

As py2rpm now requires six, it is added to CommonRedHat
requirements.

Co-authored-by: Ivan A. Melnikov <imelnikov@griddynamics.com>
Change-Id: I1f43b20168f3892184d849f1a8a0c982bb70e0a3
Fix typos/grammar in two doc files

Change-Id: Ie798bbb17edcd4ab3da2beccbed5d259a9239296
Merge "Fix typos/grammar in two doc files"