Add (currently failing) tests for user counters with threads.
Add (currently failing) tests for user counters with threads.

everbase/benchmark,mockingbirdnest/benchmark,efcs/benchmark,efcs/benchmark,google/benchmark,everbase/benchmark,disconnect3d/benchmark,everbase/benchmark,codygray/benchmark,codygray/benchmark,codygray/benchmark,google/benchmark,disconnect3d/benchmark,google/benchmark,mockingbirdnest/benchmark,mockingbirdnest/benchmark,mockingbirdnest/benchmark,everbase/benchmark,disconnect3d/benchmark,disconnect3d/benchmark,codygray/benchmark,efcs/benchmark,efcs/benchmark