Reset ResqueSpec before each UserMailer test
Reset ResqueSpec before each UserMailer test

Running the test suite with 'bundle exec rspec --seed 58707'
used to make tests fail, as it ran these out of order and
the tests were not resetting the queues appropriately.
This fixes that.

Marri/glowfic,Marri/glowfic,Marri/glowfic,Marri/glowfic