This commit moves handlers for gitrepo-related commands
from fuelclient.py to fuelclient_gitrepo.py to do 2
things:
- overcome potential shadowing issues (from fuelclient import)
- prepare for introduction of audit-related subcommands, which
would be placed in a separate file
Change-Id: Ia216205482de210b2a1126b9d62d2359fbf60005