Add IFloodlightModule interface methods to FlowManagerModule.

- FlowManagerService is just a API for FlowManager.
- FlowManagerFloodlightService interface is a sub-interface of
  IFloodlightService for getting FlowManager instance using Floodlight.
- This task is a part of ONOS-1924.

Change-Id: If7268555dd39c29340674aae5acf10d5daf8ea1c
diff --git a/src/main/java/net/onrc/onos/api/flowmanager/FlowManagerFloodlightService.java b/src/main/java/net/onrc/onos/api/flowmanager/FlowManagerFloodlightService.java
new file mode 100644
index 0000000..f5f48f0
--- /dev/null
+++ b/src/main/java/net/onrc/onos/api/flowmanager/FlowManagerFloodlightService.java
@@ -0,0 +1,11 @@
+package net.onrc.onos.api.flowmanager;
+
+import net.floodlightcontroller.core.module.IFloodlightService;
+
+/**
+ * A flow manager service as a {@link IFloodlightService} service.
+ */
+public interface FlowManagerFloodlightService extends
+        FlowManagerService,
+        IFloodlightService {
+}