Use temporary user for acceptance tests
Use temporary user for acceptance tests

Generate (and cleanup) temporary user. Use credentials of this user to
run acceptance tests.

We do this because sometimes it was possible some tests leaked admin
password on a specific failure. Hence switch to temporary user.

alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf,alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf,jimconner/paas-cf,jimconner/paas-cf,alphagov/paas-cf,jimconner/paas-cf,jimconner/paas-cf,alphagov/paas-cf,alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf