Added conversion for Tunnel Endpoints to ofplugin

Patchset #2:
-Added a few comments to oftestprovider, renumbered
the test functions and rebased.
-Dependencies for this are already merged into
controller and openflowjava.
-Test results after rebase at:
https://gist.github.com/ebb81b8344696a951de6

Patchset #1:
-Per conversations tracked in bug 1133 adding
support for flow based TEPs. As soon as
the openflow implementation is extensible
we will pull them into a seperate bundle.
In the meantime this prevents blocking.
-I broke out a couple of extension specific
type conversions that refernce NXM1Class into
a class named NxmExtensionsConvertor.
-Test and results at:
https://gist.github.com/20d049c8c61a7a03e2c7

Change-Id: I8c0e5fbe8d68eb123cabbe58db49823424d1dfb0
Signed-off-by: Brent Salisbury <brent.salisbury@gmail.com>