Fix dictionary access bug in terraform.py
Fix dictionary access bug in terraform.py

Change-Id: Ib226c9b3ea1a286dde1acb84fcd9752d803859c3
Reviewed-on: https://review.couchbase.org/c/perfrunner/+/177683
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: <82d319d5fc98f83a671388ae70b5b0fb850f28a3@couchbase.com>

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