tools: allow to reuse option parser
tools: allow to reuse option parser

Change-Id: Ifdeb8a48e11c8da965f488fda29b210a1948cc77
Reviewed-on: http://review.couchbase.org/81837
Reviewed-by: Mike Goldsmith <c43a3c67d7a1203c37ce25b098df0254011e1ce6@gmail.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

kojiromike/libcouchbase,couchbase/libcouchbase,mody/libcouchbase,avsej/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,mody/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase