Handle transient MR query count spec
Avoid transient spec for affecting CE (the same way it's currently affecting EE) - See https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1949
1) Projects::MergeRequestsController GET show as json number of queries verifies number of queries
Failure/Error: expect(recorded.count).to be_within(1).of(100)
expected 93 to be within 1 of 100
# ./spec/controllers/projects/merge_requests_controller_spec.rb:293:in `block (5 levels) in <top (required)>'
EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1949