Using sadis 5.6.0

Change-Id: I00dff65428ee9dbc6949d5f0e5a18166c8f3cf56
diff --git a/pom.xml b/pom.xml
index 7209b58..1f48201 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@
     <description>PPPoE Intermediate Agent</description>
 
     <properties>
-        <sadis.api.version>5.5.1</sadis.api.version>
+        <sadis.api.version>5.6.0</sadis.api.version>
     </properties>
 
     <modules>