Creating onos-1.4 support branch

- Starting snapshot 1.4.1-SNAPSHOT
- Updating .gitreview
- Updating Dockerfile

Change-Id: I4f0dafe89e77831b34107f472647424664206195
diff --git a/apps/vtn/pom.xml b/apps/vtn/pom.xml
index 14e39ab..d453065 100644
--- a/apps/vtn/pom.xml
+++ b/apps/vtn/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-apps</artifactId>
-        <version>1.4.0</version>
+        <version>1.4.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>