Release app version 1.3.1 with API version 1.3.1

Change-Id: I651c2f37c2ecf650babf8bc7736220be5a465bb5
diff --git a/api/pom.xml b/api/pom.xml
index f3cf121..d5273a4 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>olttopology</artifactId>
         <groupId>org.opencord</groupId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>