Releasing official voltha-onos for 2.9 with ONOS 2.5.5

Change-Id: I3c6d941f242cf5a09b1194cc46b453b19f03d085
diff --git a/dependencies.xml b/dependencies.xml
index c6789fe..a6153c9 100644
--- a/dependencies.xml
+++ b/dependencies.xml
@@ -24,13 +24,13 @@
     <version>fake</version>
 
     <properties>
-        <olt.version>5.0.0-SNAPSHOT</olt.version>
-        <sadis.version>5.5.0-SNAPSHOT</sadis.version>
-        <aaa.version>2.5.0-SNAPSHOT</aaa.version>
-        <dhcpl2relay.version>2.6.0-SNAPSHOT</dhcpl2relay.version>
-        <kafka.version>2.8.0-SNAPSHOT</kafka.version>
-        <igmpproxy.version>2.4.0-SNAPSHOT</igmpproxy.version>
-        <mcast.version>2.5.0-SNAPSHOT</mcast.version>
+        <olt.version>5.0.0</olt.version>
+        <sadis.version>5.5.1</sadis.version>
+        <aaa.version>2.5.0</aaa.version>
+        <dhcpl2relay.version>2.6.0</dhcpl2relay.version>
+        <kafka.version>2.8.0</kafka.version>
+        <igmpproxy.version>2.4.0</igmpproxy.version>
+        <mcast.version>2.5.0</mcast.version>
         <segmentrouting.version>3.0.0</segmentrouting.version>
     </properties>