Bump version for the start of Wallaby

Bump the major version for the Wallaby release after Victoria has
been branched.

Change-Id: I332514b100a042854b5c90e1a778b8ca5535ff5f

metadata.json

@@ -11,15 +11,15 @@
         },
         {
             "name": "openstack/keystone",
-            "version_requirement": ">=17.4.0 <18.0.0"
+            "version_requirement": ">=18.0.0 <19.0.0"
         },
         {
             "name": "openstack/openstacklib",
-            "version_requirement": ">=17.4.0 <18.0.0"
+            "version_requirement": ">=18.0.0 <19.0.0"
         },
         {
             "name": "openstack/oslo",
-            "version_requirement": ">=17.4.0 <18.0.0"
+            "version_requirement": ">=18.0.0 <19.0.0"
         }
     ],
     "description": "Installs and configures OpenStack Barbican.",
@@ -67,5 +67,5 @@
     ],
     "source": "git://github.com/openstack/puppet-barbican.git",
     "summary": "Puppet module for OpenStack Barbican",
-    "version": "17.4.0"
+    "version": "18.0.0"
 }