Placed API and implementation into separate packages

Change-Id: If8a9223a7a225db1b2aa2d09738857af482736bc
diff --git a/src/main/java/org/onosproject/cordvtn/cli/CordVtnFlushRules.java b/src/main/java/org/onosproject/cordvtn/cli/CordVtnFlushRules.java
index 926461f..f428ea4 100644
--- a/src/main/java/org/onosproject/cordvtn/cli/CordVtnFlushRules.java
+++ b/src/main/java/org/onosproject/cordvtn/cli/CordVtnFlushRules.java
@@ -18,7 +18,7 @@
 
 import org.apache.karaf.shell.commands.Command;
 import org.onosproject.cli.AbstractShellCommand;
-import org.onosproject.cordvtn.CordVtnNodeManager;
+import org.onosproject.cordvtn.impl.CordVtnNodeManager;
 
 /**
  * Deletes nodes from the service.