Adding configurable variables to DistributedFlowRuleStore

Change-Id: I989de6b4ca4caf8ac1e648fbae766d0f88414419
diff --git a/core/pom.xml b/core/pom.xml
index 5e2058b..97c33d8 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -52,6 +52,10 @@
             <artifactId>onlab-junit</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.compendium</artifactId>
+        </dependency>
     </dependencies>
 
     <build>