Use 'struct lcb::Server' rather chan 'class lcb::Server'
Use 'struct lcb::Server' rather chan 'class lcb::Server'

Lots of compiler warnings otherwise

Change-Id: Iaaa8d369c34d8f7546414b16b800d2536c9aa99a
Reviewed-on: http://review.couchbase.org/71051
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

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