Moving Sadis dependency to released 3.1.1 version

Change-Id: I3f07ca7b73e884988c53610a4875b135d58f4c45
diff --git a/api/pom.xml b/api/pom.xml
index 30f6a3a..ff6832f 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -33,7 +33,7 @@
 
     <description>OLT application API</description>
     <properties>
-        <sadis.api.version>3.1.1-SNAPSHOT</sadis.api.version>
+        <sadis.api.version>3.1.1</sadis.api.version>
     </properties>
 
     <dependencies>