added slack notifaction to travis config

.travis.yml

@@ -20,6 +20,11 @@ notifications:
     on_success: change
     on_failure: always
     on_start: false
+  slack:
+    rooms:
+      secure: "lngJ/HEAFBbD5AdiO9avMqptKpZHdmEwOzS9FabZjkdFh7yAYueTk5RniPUvShjsKtThYm7cJ8AtDMDwc07NvPrzbMBRtUJGwuDT+7c7YFALGFJ1NYi+emkC9x1oafvmPgEYSE+tMKzNcwrHi3ytGgKdIotsKwaF35QNXYA9aMs="
+    on_success: change
+    on_failure: always
 
 before_deploy: mvn -fmain/pom.xml -Puber-jar clean package -DskipTests