create branch 2.8

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branch : 2.8
Fix naming collision in generate_requests

Only requests with last products were deleted.

issue3684
review3591003
(grafted from e4e978efa7455254086c22a98f35f241786cc8aa)

--HG--
branch : 2.8
extra : source : e4e978efa7455254086c22a98f35f241786cc8aa
Prepare release 2.8.2

--HG--
branch : 2.8
Added tag 2.8.2 for changeset 3b1031076233

--HG--
branch : 2.8
Increase version number

--HG--
branch : 2.8