move mgr_HOST to C++
move mgr_HOST to C++

Change-Id: I0945615e0e93c31ec7d4d233a6f15ba93023ff15
Reviewed-on: http://review.couchbase.org/76142
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Subhashni Balakrishnan <7129c8e37b832c7bd362ff375532d24b98ef5162@gmail.com>

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