sysutils/apache-mesos: Enable Java bindings request for review

[James Wright]

    Please could anyone interested have a look at the following changes 
to the sysutils/apache-mesos regarding enabling Java bindings in libmesos;

Phabricator
https://reviews.freebsd.org/D25361


   One specific area of concern is dealing with the Maven dependencies 
fetched mid-way through the build phase. I thought I had a solution 
utilizing
the maven dependency plugin "go-offline" goal in the fetch phase and 
providing a skeleton POM to describe the dependencies required. However, 
there
is a question mark over where these dependencies should be downloaded 
during the fetch phase;

${HOME}/.m2  -- Won't work because not writeable when building with 
poudriere.
${TMPDIR}/.m2 -- Might work (haven't tested if writeable suring poudrier 
build yet)?
${DISTDIR}/.m2  -- Artifacts downloaded would need to be checksummed and 
added to distfile (don't think we have a good way of doing that for 
large number of deps)?


For more info please refer to the comments in the afore mentioned 
Phabricator review.


Many Thanks,
James