remove multinode from list of supported mode

There is only HA mode for Fuel 8.0

Change-Id: I30b95d257ca8aaaf8cdf30d6d3e834a22b2ac63e

metadata.yaml

@@ -3,7 +3,7 @@ name: fuel-plugin-vmware-dvs
 # Human-readable name for your plugin
 title: Neutron VMware DVS ML2 plugin
 # Plugin version
-version: '2.1.14'
+version: '2.1.15'
 # Description
 description: Enable to use plugin vmware_dvs for Neutron
 # Required fuel version
@@ -23,7 +23,7 @@ is_hotpluggable: false
 releases:
   - os: ubuntu
     version: liberty-8.0
-    mode: ['ha', 'multinode']
+    mode: ['ha']
     deployment_scripts_path: deployment_scripts/
     repository_path: repositories/ubuntu