CCBC-1485: allow to disable tracer for connected instance
CCBC-1485: allow to disable tracer for connected instance

Change-Id: I3840813729bf874723fa5f3a435d22d5e1d47e45
Reviewed-on: http://review.couchbase.org/c/libcouchbase/+/161753
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase