Fix SecurityGroupsOutputTest v3 security group tests

SecurityGroupsOutputTest was testing with security_group_api set to
neturon instead of nova. In addition, this patch fixes the tests to
match the v2 tests which tested more then the name matching 'fake'.

Fixes bug: 1229515

Change-Id: I5b1de35add3b8a131b9077c1c9396ae70d2faefa
Merge "Fix SecurityGroupsOutputTest v3 security group tests"