create branch 3.0

--HG--
branch : 3.0
Fix naming collision in generate_requests

Only requests with last products were deleted.

issue3684
review3591003
(grafted from e4e978efa7455254086c22a98f35f241786cc8aa)

--HG--
branch : 3.0
extra : source : e4e978efa7455254086c22a98f35f241786cc8aa
Prepare release 3.0.1

--HG--
branch : 3.0
Added tag 3.0.1 for changeset d66499f24a1b

--HG--
branch : 3.0
Increase version number

--HG--
branch : 3.0