Release version 3.1.0

Change-Id: I6d7c11b675795ea31ff13e906bb2b06e8a0edccd
diff --git a/api/pom.xml b/api/pom.xml
index ff6832f..f76188e 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>olt</artifactId>
         <groupId>org.opencord</groupId>
-        <version>3.1.0-SNAPSHOT</version>
+        <version>3.1.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>