Add unit tests to cover print_item_locations
Add unit tests to cover print_item_locations

Add unit tests to cover all code paths in print_item_locations
function in cli/info.py.

Update comment to match what's tested for invalid/missing policy.

Update tests to verify output of print_item_locations

Corrected PEP8 compliance violations.

Change-Id: I84958cb70205ee8d7ea246826dd56201fa642da9

swiftstack/swift,psachin/swift,hurricanerix/swift,notmyname/swift,smerritt/swift,rackerlabs/swift,levythu/swift,openstack/swift,hurricanerix/swift,openstack/swift,larsbutler/swift,clayg/swift,thiagodasilva/swift,thiagodasilva/swift,nadeemsyed/swift,daasbank/swift,swiftstack/swift,smerritt/swift,nadeemsyed/swift,matthewoliver/swift,revoer/keystone-8.0.0,prashanthpai/swift,openstack/swift,daasbank/swift,tipabu/swift,prashanthpai/swift,rackerlabs/swift,redbo/swift,tipabu/swift,matthewoliver/swift,nadeemsyed/swift,aerwin3/swift,tipabu/swift,clayg/swift,smerritt/swift,psachin/swift,notmyname/swift,smerritt/swift,hurricanerix/swift,levythu/swift,williamthegrey/swift,larsbutler/swift,psachin/swift,clayg/swift,psachin/swift,swiftstack/swift,redbo/swift,matthewoliver/swift,tipabu/swift,nadeemsyed/swift,notmyname/swift,hurricanerix/swift,aerwin3/swift,williamthegrey/swift,matthewoliver/swift,openstack/swift,clayg/swift,revoer/keystone-8.0.0,notmyname/swift