Add yangtools to rpm packaging. Also remove test artifacts from some packages.

Add yangtools to rpm packaging. Also remove test artifacts from some packages.

- Added yangtools.spec to make the yangtools.rpm.
- Modified controller.spec to not package the yangtools. There is still an issue
with the yangtools.thirdparty.(antlr4|extend-lib-osgi) jars still being pulled in
by the controller project. Need to have them moved to the yangtools package.
- Modified opendaylight.spec to include the new yangtools rpm.
- Removed test artifacts from openflowjava and openflowplugin rpms.

Change-Id: I9535bc0b18e68d3a5a8f7940312ce2ebc730e2ba
Signed-off-by: Sam Hague <shague@redhat.com>