Move com.bigswitch.floodlight.vendor into floodlight tree.

* Don't rename the package yet though.
* Add OFBsnL2TableSetVendorData.java and OFBsnL2TableVendorData.java

src/main/java/com/bigswitch/floodlight/vendor/OFNiciraVendorActionFactory.java

+package com.bigswitch.floodlight.vendor;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.openflow.protocol.action.OFActionVendor;
+import org.openflow.protocol.factory.OFVendorActionFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class OFNiciraVendorActionFactory implements OFVendorActionFactory {
+    protected static Logger logger =
+            LoggerFactory.getLogger(OFNiciraVendorActionFactory.class);
+
+    static class OFActionNiciraVendorDemux extends OFActionNiciraVendor {
+        OFActionNiciraVendorDemux() {
+            super((short) 0);
+        }
+    }
+
+    @Override
+    public OFActionVendor readFrom(ChannelBuffer data) {
+        data.markReaderIndex();
+        OFActionNiciraVendorDemux demux = new OFActionNiciraVendorDemux();
+        demux.readFrom(data);
+        data.resetReaderIndex();
+
+        switch(demux.getSubtype()) {
+            case OFActionNiciraTtlDecrement.TTL_DECREMENT_SUBTYPE:
+                OFActionNiciraTtlDecrement ttlAction = new OFActionNiciraTtlDecrement();
+                ttlAction.readFrom(data);
+                return ttlAction;
+            default:
+                logger.error("Unknown Nicira vendor action subtype: "+demux.getSubtype());
+                return null;
+        }
+    }
+
+}

src/main/java/com/bigswitch/floodlight/vendor/OFVendorActions.java

+package com.bigswitch.floodlight.vendor;
+
+import org.openflow.protocol.factory.OFVendorActionRegistry;
+
+public final class OFVendorActions {
+    public static final void registerStandardVendorActions() {
+        OFVendorActionRegistry registry = OFVendorActionRegistry.getInstance();
+        registry.register(OFActionBigSwitchVendor.BSN_VENDOR_ID, new OFBigSwitchVendorActionFactory());
+        registry.register(OFActionNiciraVendor.NICIRA_VENDOR_ID, new OFNiciraVendorActionFactory());
+    }
+}
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