Sketching SB & NB API.
Modified onos-of-api pom to subsume openflowj loxi-generated stuff.
diff --git a/net/api/src/main/java/org/onlab/onos/net/device/DeviceProviderBroker.java b/net/api/src/main/java/org/onlab/onos/net/device/DeviceProviderBroker.java
index 926f76e..a2016a1 100644
--- a/net/api/src/main/java/org/onlab/onos/net/device/DeviceProviderBroker.java
+++ b/net/api/src/main/java/org/onlab/onos/net/device/DeviceProviderBroker.java
@@ -1,6 +1,6 @@
 package org.onlab.onos.net.device;
 
-import org.onlab.onos.net.ProviderBroker;
+import org.onlab.onos.provider.ProviderBroker;
 
 /**
  * Abstraction of a device provider brokerage.