Added .gitlab-ci.yml

Change-Id: Ic5ba097cf8129096fc8bf34a36aef180cbbba338
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

.gitlab-ci.yml

+# Copyright Contributors to ETSI OSM
+#
+# 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.
+
+include:
+  - project: 'devops/cicd'
+    file: '/templates/osm-base.yml'