Split CI tests for security_group and security_group_rule modules

Previously, all security_group{,_info} and security_group_rule{,_info}
modules were tested in the same Ansible role. This patch splits
tests into two separate Ansible roles to increase readibility and
prevent variable name conflicts, e.g. for expected_fields.

Change-Id: Ifc28435147b3bfe88d4ee5e176469a53b7395dc0

ci/roles/security_group/defaults/main.yml

@@ -1,20 +1 @@
-expected_fields:
-  - created_at
-  - description
-  - direction
-  - ether_type
-  - id
-  - name
-  - port_range_max
-  - port_range_min
-  - project_id
-  - protocol
-  - remote_address_group_id
-  - remote_group_id
-  - remote_ip_prefix
-  - revision_number
-  - security_group_id
-  - tags
-  - tenant_id
-  - updated_at
 secgroup_name: shade_secgroup