support ssl in ycsb load phase
support ssl in ycsb load phase

Change-Id: If6b308cd9647f2c79cd1904b24cb07cdf58bc526
Reviewed-on: https://review.couchbase.org/c/perfrunner/+/174707
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Daniel Nagy <8d5a66e0b9d9f09515b5499449a5435e905f875d@couchbase.com>

couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner