Add pipeline script to release an individual app

+ add some missing copyright headers.

Change-Id: I73c7a7cf2d7c90d8fd2e05078ef3a165db8b2d3c
diff --git a/.jenkins/jenkins.plugins.slack.SlackNotifier.xml b/.jenkins/jenkins.plugins.slack.SlackNotifier.xml
index 78149ae..60493ab 100644
--- a/.jenkins/jenkins.plugins.slack.SlackNotifier.xml
+++ b/.jenkins/jenkins.plugins.slack.SlackNotifier.xml
@@ -1,3 +1,18 @@
+<!--
+  ~ Copyright 2017-present Open Networking Foundation
+  ~
+  ~ 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.
+  -->
 <jenkins.plugins.slack.SlackNotifier plugin="slack@2.0.1">
   <teamDomain>opencord</teamDomain>
   <authToken>kkueX3fmLtcGV6vM4Sp4NVFz</authToken>