[ONOS-5916] Add skeleton code of mapping management application

Change-Id: I267f07d3869a88066428281c91e6647fc1216056
diff --git a/apps/pom.xml b/apps/pom.xml
index 25d3313..9dc33aa 100644
--- a/apps/pom.xml
+++ b/apps/pom.xml
@@ -87,6 +87,7 @@
         <module>restconf</module>
         <module>ofagent</module>
         <module>intentsync</module>
+        <module>mappingmanagement</module>
     </modules>
 
     <properties>