Prepare for post-Pike updates

Prepare the metadata for a post-Pike release.

Change-Id: Ia173bc91915ec796e30eab5517eae4afe33a42da

metadata.json

@@ -57,5 +57,5 @@
     ],
     "source": "git://github.com/openstack/puppet-openstack_extras.git",
     "summary": "Puppet OpenStack Extras Module",
-    "version": "11.3.0"
-}
+    "version": "11.4.0"
+}

releasenotes/source/conf.py

@@ -52,9 +52,9 @@ copyright = u'2017, Puppet OpenStack Developers'
 # built documents.
 #
 # The short X.Y version.
-version = '11.3.0'
+version = ''
 # The full version, including alpha/beta/rc tags.
-release = '11.3.0'
+release = ''
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.