Some behat tests are failing because default value for 'messagingallusers' is 0, but to get same search results as in deprecated functions, value needs to be 1. 

Those behat tests had been changed, setting 'mssagingallusers' = 1 in MDL-63282.

We should redo those behat tests, decide how many new tests we need, and remove the ones we don't need anymore.