Enable checkstyle whitespace rules

Enable checkstyle whitespace rules and fix the violations that are reported.
Also suppressed checkstyle errors from Topology.java, which is machine generated.

Change-Id: I7c608321359f31b3b70c77a20b77e46306d4d2ec
diff --git a/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java b/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
index 68bfaff..3d2ab93 100644
--- a/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
+++ b/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
@@ -377,7 +377,7 @@
                     Boolean isflowEntryForThisSwitch = false;
                     net.onrc.onos.core.topology.Path path = pathIntent.getPath();
 
-                    for (Iterator<LinkEvent> i = path.iterator(); i.hasNext(); ) {
+                    for (Iterator<LinkEvent> i = path.iterator(); i.hasNext();) {
                         LinkEvent le = (LinkEvent) i.next();
                         if (le.getSrc().dpid == sw.getId()) {
                             log.debug("src {} dst {}", le.getSrc(), le.getDst());