Drop btrfs support from RHEL and CentOS

Packages are no longer available to build on RHEL and CentOS and
btrfs is not longer supported, so we should not build with it.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

contrib/test/integration/system.yml

@@ -19,6 +19,14 @@
   async: 600
   poll: 10
 
+- name: Add Btrfs for Fedora
+  package:
+    name: "{{ item }}"
+    state: present
+  with_items:
+   - btrfs-progs-devel
+  when: ansible_distribution in ['Fedora']
+
 - name: Update all packages
   package:
     name: '*'

contrib/test/integration/vars.yml

@@ -4,7 +4,6 @@
 xunit: false
 
 rpm_pkgs:
-    - btrfs-progs-devel
     - container-selinux
     - curl
     - device-mapper-devel