Add testcases for security groups

Adds tests for those GET API functions that accept params

List_security_groups Nova API

Skip security groups list by 'all_tenants' search filter test
if neutron is enabled because neutron do not support 'all_tenants'
search filter.

Change-Id: I5867acd03c3d184911281c673ce804455f269f57
Partial-Bug: #1086590
Merge "Add testcases for security groups"