CLOUDSTACK-7949: Fixing issue in test_base_image_updation.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7942: Fixing account permission issue in test_template.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7934: Fixed cleanup issues test_escalations_volumes.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>