MB-8903: Rename UPR_WIRE_* constants to UPR_*

This commit is just renaming the constants, without any
functional changes.

Change-Id: Ie6286f8118aa6b96e4dcda90a0b53dfe4772f640
Reviewed-on: http://review.couchbase.org/30541
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>
Tested-by: Volker Mische <volker.mische@gmail.com>