Organized imports for main classes

Change-Id: I3b05d7f289706aef04019a820be9989f8fb54945
diff --git a/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java b/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java
index 489dbdd..daed20b 100644
--- a/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java
+++ b/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java
@@ -57,13 +57,13 @@
 import net.floodlightcontroller.util.EventHistory;
 import net.floodlightcontroller.util.EventHistory.EvAction;
 import net.onrc.onos.core.linkdiscovery.ILinkDiscovery;
+import net.onrc.onos.core.linkdiscovery.ILinkDiscovery.LDUpdate;
+import net.onrc.onos.core.linkdiscovery.ILinkDiscovery.UpdateOperation;
 import net.onrc.onos.core.linkdiscovery.ILinkDiscoveryListener;
 import net.onrc.onos.core.linkdiscovery.ILinkDiscoveryService;
 import net.onrc.onos.core.linkdiscovery.Link;
 import net.onrc.onos.core.linkdiscovery.LinkInfo;
 import net.onrc.onos.core.linkdiscovery.NodePortTuple;
-import net.onrc.onos.core.linkdiscovery.ILinkDiscovery.LDUpdate;
-import net.onrc.onos.core.linkdiscovery.ILinkDiscovery.UpdateOperation;
 import net.onrc.onos.core.linkdiscovery.web.LinkDiscoveryWebRoutable;
 import net.onrc.onos.core.main.IOnosRemoteSwitch;
 import net.onrc.onos.core.packet.BSN;