Update versions for Queens cycle

Since we've cut the release for pike, we need to open master up
with Queens version information.

Change-Id: If7f2a89ba1924980eb003eba20729df3954950f6

metadata.json

@@ -67,5 +67,5 @@
     ],
     "source": "git://github.com/openstack/puppet-vswitch.git",
     "summary": "A module for providing things (ports, bridges) to vSwitches (OVS)",
-    "version": "7.3.0"
+    "version": "8.0.0-dev"
 }

releasenotes/source/conf.py

@@ -53,9 +53,9 @@ copyright = u'2017, Puppet OpenStack Developers'
 # built documents.
 #
 # The short X.Y version.
-version = '7.3.0'
+version = '8.0.0'
 # The full version, including alpha/beta/rc tags.
-release = '7.3.0'
+release = '8.0.0-dev'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.