Add $options parameter for testUserForCreation()

Add $options parameter for testUserForCreation()

This will allow providers to know whether the call is just for testing
(from ApiQueryUsers) or for actual creation, and skip duplicate work
when testForAccountCreation() is going to be called.

Change-Id: Id3ef713fd377135d78f66e5100dedd4689293b59
Depends-On: I4af8b3b692f60c42f8685b90be5936da7ba4e2e2
Depends-On: Ie9639a15d04b387be0e72754301eb6d91cd8adc2
Depends-On: I063cbdfbd9a223bf2391fce2b714ab82ddd3272f
Depends-On: I7c67512634f6e72251911238f083857da9fd3f84