Existing 16.01 stable branch

Fix liberty/mitaka typo from previous test definition update batch.

[james-page, r=gnuoy] Add status support

Clear up incorrect use of assert_called

This also reveals that the hook registration tests fail; dropped as patching not possible due to indirection in hooks object already containing a handle to the original function

[corey.bryant,trivial] Pin oslo libraries for juno amulet deploy from…

… source.