Changed triggering on INSERT to GETRQ (temporary?)

Changed triggering on INSERT to GETRQ (temporary?)

This is backwards compatible with previous versions, with the one
difference being that the Q2I information may be a bit shorter.

The changes forthcoming with the explicit unplugging (2.6.20 + Jens'
unplag patches) require this. We may need to redefine and/or add a new
measurement once that settles down. When that happens, we'll most likely be
renaming things to better reflect GETRQ versus INSERT.

Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>