CLOUDSTACK-702: 1. Moved common code to setupClass method 2. Added a test to deply vm in new CIDR and verify dns service on alias IP

Conflicts:

	test/integration/component/maint/test_multiple_ip_ranges.py

Signed-off-by: sanjeevneelarapu <sanjeev.neelarapu@citrix.com>
Signed-off-by: venkataswamybabu budumuru <venkataswamybabu.budumuru@citrix.com>