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: If49f6ee945e3bc72c1c2ab36deab1f9aab6ddc17
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

meta/main.yml

@@ -18,11 +18,15 @@ galaxy_info:
     A pure-Python asynchronous library to interface with Gearman.
   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,<2.4.0
+ansible>=2.4.0