Add tests for bin/swift
Add tests for bin/swift

Tests are written to ensure bin/swift is working properly and using
functions from swiftclient modules as expected.

Change-Id: Idb0581516b7e0a41c97977bb0bb9f8290f67ad13

zackmdavis/python-swiftclient,zackmdavis/python-swiftclient,sohonetlabs/python-swiftclient,openstack/python-swiftclient,VyacheslavHashov/python-swiftclient,JioCloud/python-swiftclient,VyacheslavHashov/python-swiftclient,ironsmile/python-swiftclient,pratikmallya/python-swiftclient,krnflake/python-hubicclient,varunarya10/python-swiftclient,iostackproject/IO-Bandwidth-Differentiation-Client,sohonetlabs/python-swiftclient,JioCloud/python-swiftclient,pratikmallya/python-swiftclient,openstack/python-swiftclient,ironsmile/python-swiftclient,iostackproject/IO-Bandwidth-Differentiation-Client,varunarya10/python-swiftclient,jeseem/python-swiftclient,jeseem/python-swiftclient