Bug 2007 fixed: removed the while true from K8sHelmBaseConnector._store_status

Made the necessary refactor and fixed the tests accordingly. Now, the
`_store_status` method is not executed forever, it is only executed once
each time is called.

Change-Id: Ia96ab3152fe7f838d1b81dd02c2d22373b805f4a
Signed-off-by: Pedro Escaleira <escaleira@av.it.pt>