tests: set needed config in group_vars/all for rhcs testing

Instead of relying on environment variables and --extra-vars simply
modify the group_vars/all that ships with the specific testing scenario
to enable ceph_rchs testing.

Signed-off-by: Andrew Schoen <aschoen@redhat.com>

tests/functional/rhcs_setup.yml

@@ -27,6 +27,25 @@
         dest: "{{ change_dir }}/vagrant_variables.yml"
       when: change_dir is defined
 
+    - name: change ceph_stable to False
+      replace:
+        regexp: "ceph_stable:.*"
+        replace: "ceph_stable: False"
+        dest: "{{ change_dir }}/group_vars/all"
+      when: change_dir is defined
+
+    - name: set ceph_rhcs to True
+      lineinfile:
+        line: "ceph_rhcs: True"
+        dest: "{{ change_dir }}/group_vars/all"
+      when: change_dir is defined
+
+    - name: set ceph_origin to distro
+      lineinfile:
+        line: "ceph_origin: distro"
+        dest: "{{ change_dir }}/group_vars/all"
+      when: change_dir is defined
+
 - hosts: all
   gather_facts: true
   become: yes