Various changes in BMv2 driver and provider modules (onos1.6 cherry-pick)

Driver notable changes:
- Implemented new behaviors, removed deprecated ones
- Removed flow rule translator classes (now under protocol module)
- Improved FlowRuleProgrammable: now it uses BMv2TableEntryService
	to lookup/bind flow rules with BMv2 table entries, retrieves flow
	statistics, better exception handling when adding/replacing/removing
	table entries.
- Improved PacketProgrammable: better exception handling and logging

Provider notable changes:
- Bmv2DeviceProvider: detects and notifies device configuration
	changes and reboots to Bmv2DeviceContextService, added support for
	periodic polling of port statistics
- Bmv2PacketProvider: implemented workaround for OutboundPackets with
	flood treatment

Change-Id: I79b756b533d4afb6b70025a137b2e811fd42a4e8
diff --git a/drivers/pom.xml b/drivers/pom.xml
index 26e2ff7..99db6e1 100644
--- a/drivers/pom.xml
+++ b/drivers/pom.xml
@@ -41,7 +41,7 @@
         <module>utilities</module>
         <module>lumentum</module>
         <module>bti</module>
-        <!--<module>bmv2</module>-->
+        <module>bmv2</module>
         <module>corsa</module>
         <module>optical</module>
     </modules>