Adding package structure for swift_proxy

This package structure is designed for Barbican
swift proxy specific tests.

Change-Id: I3128c04a199598b92cc25fc0f5aea09a6db6baaa
ObjectStorage tests can now be tagged as requiring middleware to be configured in order to be run.

Change-Id: I8f6e1346a829ebeda71231f95756d92549c6f031
Merge "Adding package structure for swift_proxy"