Scripts for installing jvpp jars to local mvn repo

Scripts for installing jvpp jars to local mvn repo

By default hc2vpp build downloads latest jvpp
packages from nexus.fd.io.
They might not be compatible with installed
vpp (e.g. in case of non-backward
compatible vpp api changes).

In order to prevent API mismatch,
it is required to use jvpp version corresponding
to the vpp installed.

The patch includes scripts that can be used
before building hc2vpp to install jvpp jars
from vpp build dir or vpp-api-java package.

Change-Id: I9aa0dc37921e022e5644c54238d3d579f6eb5ba8
Signed-off-by: Marek Gradzki <[email protected]>