Functional tests now work on G4S

The OpenStack Swift functional tests now have minor
modifications to be able to run against G4S.  Some
of the tests have to be skipped due to yet unsupported
features.

NOTE:
To run the functional tests you must set the following:
1. Set the following value in /etc/swift/fs.conf:
	accurate_size_in_listing = on
2. Make sure to always delete all the content in
/mnt/gluster-object/test/... and /mnt/gluster-object/test2
before running the tests

Change-Id: I79d6875f033131f45c4d06a8029823c3abf514cd
Signed-off-by: Luis Pabon <lpabon@redhat.com>