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>
(cherry picked from commit 67c96d419d08f5a2702eee0aa64958e486f74703)
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>
[GSOC] Meng's mid-term report

Signed-off-by: Sebastien Goasguen <runseb@gmail.com>