fix call to get_memcached_port in Fragmentation test
fix call to get_memcached_port in Fragmentation test

Change-Id: I3e2cbd7d363d22449b9cc39c618d15a4d2f27173
Reviewed-on: http://review.couchbase.org/46264
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>
Tested-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>

mikewied/perfrunner,couchbase/perfrunner,hsharsha/perfrunner,EricACooper/perfrunner,PaintScratcher/perfrunner,thomas-couchbase/perfrunner,dkao-cb/perfrunner,couchbase/perfrunner,dkao-cb/perfrunner,pavel-paulau/perfrunner,PaintScratcher/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,pavel-paulau/perfrunner,mikewied/perfrunner,pavel-paulau/perfrunner,EricACooper/perfrunner,vmx/perfrunner,hsharsha/perfrunner,pavel-paulau/perfrunner,vmx/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,pavel-paulau/perfrunner,thomas-couchbase/perfrunner