Database Launch Form shouldn't autocomplete

The form element on the Database Launch page should have the attribute:
autocomplete="off" set.

I finally found the mechanism to add attributes to workflow-forms, so
please ignore my first change-set.  :-)

Change-Id: I3f7f4a24580bd2fa5a40ed673a8d33d81e6e9659
Closes-Bug: 1316226
Merge "Database Launch Form shouldn't autocomplete"