node: Alias NodeObject to Node

In case there is still some usage if the old NodeObject let's catch this
calls for now but we should remove this soon.

crowbar_framework/app/models/node_object.rb

@@ -0,0 +1,17 @@
+#
+# Copyright 2013-2017, SUSE LINUX GmbH
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+NodeObject = Node