CLOUDSTACK-3892
Implement the download url expiration functionality for templates. Also persist the template download urls after their creation
Signed off by : nitin mehta<nitin.mehta@citrix.com>
CLOUDSTACK-3841: Fixed test case issue. The exception raised earlier was valid behaviour, added missing assertRaiss statement

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
CLOUDSTACK-3454: Fix test_portable_publicip

Added isportable param to associateIP API. Fixed base class
for PortableIP tio call portableip APIs.
Removed test_createPortablePublicIPAcquire from basic zone run
requires additional network creation handling which can be done
in component tests.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
(cherry picked from commit 4054a8e2ac91eee6cbc0c63094016068bdbe62b8)