CLOUDSTACK-2513: VPN tests refer to invalid connection.user in cloudConnection

cloudConnection object should always have "user" and "passwd" attributes.
And they are "None" while creating userAPIClient. As we already
have "user" and "password" for mgmt server.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
CLOUDSTACK-2478: Fix test_volumes.py script for BVT failures

removed storage type in compute offering and disk offering

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
CLOUDSTACK-2542: Fix router test for basic zone

Signed-off-by: Prasanna Santhanam <tsp@apache.org>