Since `assertIn` is provided for checking if value exists in given
container, it is not formal to use `assertTrue` for it.
Change-Id: Ie1392839b5ca436957463bb29f2784d48cfcbf75
This patch moves the glanceclient unit tests to the standard directory
(xxxclient/tests/unit) in preparation for adding functional gate tests
'check-glanceclient-dsvm-functional' in the same vein as existing client
tests for other projects, eg:
* check-novaclient-dsvm-functional
* check-keystoneclient-dsvm-functional
* check-neutronclient-dsvm-functional
Change-Id: I29d4b9e3a428c851575ee9afde40d6df583456c4
Kamil Rykowski