Add a check for compute api versions to verify_tempest_config

This commit adds another verification method to the
verify_tempest_config script that adds a check to see if the compute
v3 api is enabled.

Partially implements bp config-verification

Change-Id: Idae7db73c9eba94b7f74ec2f71e20d4267aa582c
Fixing typo in test_volumes_get.py

The word verification is mispelt in test_volumes_get.py.

Change-Id: I0d7891a5574aa9503f0d5765210a8285c331ffe7
Fix glance_http HTTPS response issues

This commit is a dual of python-glanceclient change:
I3a973da3b962c7572ae0f61f6996bdd1f0048339

Also, a bad file descriptor error is caused by the socket being closed
to soon. This commit adds overloads close() for the
VerifiedHTTPSConnection subclass which will remove the reference to
socket before making the call in the base HTTPConnection.close(). This
will avoid socket being closed before the response body is read. The
socket will close when the response close is called.

Closes-Bug: #1272828

Change-Id: Ia30058bc4752489107b998bd44d38c27901cfe63
Merge "Add a check for compute api versions to verify_tempest_config"
Merge "Fix glance_http HTTPS response issues"
Merge "Fixing typo in test_volumes_get.py"