Improves unit test coverage for dcmanager's orchestrator/states/kube functionality.
Test plan:
All of the tests were created taking into account the
output of 'tox -c tox.ini -e cover' command
Story: 2007082
Task: 49309
Change-Id: I14a884e884b78aadb21d7276b49aada70aceb974
Signed-off-by: rlima <Raphael.Lima@windriver.com>