sdc-pubsub maven integration

Added pom.xml file and defined maven clean and install stages

Change-Id: I31c6997e55bf0d39fd56220a82d1d8ca2f6d5583
Issue-ID: SDC-1540
Signed-off-by: Idan Amit <ia096e@intl.att.com>
diff --git a/.npmignore b/.npmignore
index 5c6c56b..56d2e84 100644
--- a/.npmignore
+++ b/.npmignore
@@ -10,4 +10,7 @@
 .idea/
 .gitignore
 .npm-debug.log
-INFO.yaml
\ No newline at end of file
+INFO.yaml
+sdc-pubsub.iml
+node/
+pom.xml
\ No newline at end of file