LICENSE bundled in all built OSGi bundle JARs

LICENSE bundled in all built OSGi bundle JARs

Work was done a while ago (by Thanh) to put a LICENSE into
target/classes expecting that to end up in all built JARs, but it
actually never did, which I stumbled upon in the context of
https://git.opendaylight.org/gerrit/#/c/48443/.  This remedies that by
explicitly instructing the maven-bundle-plugin to additionally bundle
the LICENSE text file (and the META-INF/git.properties after this is
merged).

Change-Id: If382d763b5fabe21cfed9e7c51fa3d4f9b31e47a
Signed-off-by: Michael Vorburger <vorburger@redhat.com>