Add the ability to rename a VM

Adds a vm_rename operation to VmOrTemplate and a supports feature mixin
feature.

https://bugzilla.redhat.com/show_bug.cgi?id=1559184

app/models/mixins/supports_feature_mixin.rb

@@ -118,6 +118,7 @@ module SupportsFeatureMixin
     :remove_security_group               => 'Remove Security Group',
     :remove_snapshot                     => 'Remove Snapshot',
     :remove_snapshot_by_description      => 'Remove snapshot having a description',
+    :rename                              => 'Rename a VM',
     :reset                               => 'Reset',
     :resize                              => 'Resizing',
     :retire                              => 'Retirement',

app/models/vm_or_template/operations.rb

@@ -64,6 +64,17 @@ def vm_destroy
     check_policy_prevent(:request_vm_destroy, :raw_destroy)
   end
 
+  def raw_rename(new_name)
+    unless ext_management_system
+      raise _("VM has no Provider, unable to renamey VM")
+    end
+    run_command_via_parent(:vm_rename, :new_name => new_name)
+  end
+
+  def rename(new_name)
+    raw_rename(new_name)
+  end
+
   private
 
   #