Deuce Context - OpenStack Swift - Storage URL

JIRA: CBDEUCE-153
- Update to store the Storage URL for Swift in the Deuce Context OpenStack object under a Swift object
- Fixes Swift mocking so you only have to set a variable to True (default) to use the mock, or False to use the real swift client
Merge branch 'enhancement_test_context_unified' into enhancement_deuce_context_swift_storage_url
Merge pull request #84 from BenjamenMeyer/enhancement_deuce_context_swift_storage_url

Enhancement deuce context swift storage url