Moving to offically released onos-2.5.5

Change-Id: I273508cbfb88cdb9878aa977f0dcea7d70ff1036
diff --git a/api/pom.xml b/api/pom.xml
index 81610f2..814e906 100755
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>sadis</artifactId>
         <groupId>org.opencord</groupId>
-        <version>5.5.0</version>
+        <version>5.5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>