csprd02 - (minor) itsm IDs for links

["Yves" <yves@opentag.com>]

I've noticed that several ITS attributes were anchored using IDs/names starting with "itsm_" (e.g.
http://docs.oasis-open.org/xliff/xliff-core/v2.1/csprd02/xliff-core-v2.1-csprd02.html#itsm_locQualityIssueComment) while there are
now ITS attributes, not ITSM.

I know it's just because of the historical changes, and this has no relevance for conformance, but keeping the IDs with that prefix
may be a bit confusing, especially since there is no indication in the description of the attribute to which namespace it belongs.

-ys