Bump minimal version of ansible to 2.4.0

Currently 2.4.0 is the oldest release of ansible, everything later is
EOL. Update our meta data into include this and the platforms we
currently tests with.

Change-Id: Iea11f4401aa48b87f43da02faab3e47cdee1353e
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

meta/main.yml

@@ -17,11 +17,15 @@ galaxy_info:
   description: Shade is a simple client library for operating OpenStack clouds
   company: Red Hat, Inc.
   license: Apache
-  min_ansible_version: 2.0
+  min_ansible_version: 2.4
   platforms:
-  - name: EL
+  - name: Fedora
     versions:
-    - 7
+    - 27
+  - name: Ubuntu
+    versions:
+    - 16.04
+    - 18.04
   categories:
-  - cloud
+  - system
 dependencies: []

requirements.txt

@@ -1 +1 @@
-ansible>=2.0.0
+ansible>=2.4.0