Contrail plugin structure added

Because Contrail plugin
release is targeted at 6.1 Fuel release,
this commit contains initial structure for the plugin.

Change-Id: Ie3699cf4db461d9dcaabfae085ce5bdb845c01b9

metadata.yaml

@@ -0,0 +1,26 @@
+# Plugin name
+name: contrail
+# Human-readable name for your plugin
+title: Fuel contrail plugin
+# Plugin version
+version: 1.0.0
+# Description
+description: Enable to use Contrail plugin
+# Required fuel version
+fuel_version: ['6.1']
+
+# The plugin is compatible with releases in the list
+releases:
+  - os: ubuntu
+    version: 2014.2-6.1
+    mode: ['ha', 'multinode']
+    deployment_scripts_path: deployment_scripts/
+    repository_path: repositories/ubuntu
+  - os: centos
+    version: 2014.2-6.1
+    mode: ['ha', 'multinode']
+    deployment_scripts_path: deployment_scripts/
+    repository_path: repositories/centos
+
+# Version of plugin package
+package_version: '1.0.0'