memory optimization and minor bug fix

[pozzobon]

memory optimization: moved from "pointers to vectors" to "vectors" to correctly deallocate memory at the end of loops.
minor bug fix: information stored in StubAccepted TTStub collection - correct correspondence between half-strip units and full-strip units is restored. this does not affect the stub finding step but just how the information is stored in the class data members

[cmsbuild]

A new Pull Request was created by @pozzobon for CMSSW_6_2_X_SLHC.

memory optimization and minor bug fix

It involves the following packages:

L1Trigger/TrackTrigger
SimTracker/TrackTriggerAssociation

@civanch, @nclopezo, @mdhildreth, @cmsbuild, @Degano, @mulhearn can you please review it and eventually sign? Thanks.
@cerati, @GiacomoSguazzoni, @rovere, @venturia this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@andersonjacob, @mark-grimes you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[mark-grimes]

merge

Tested with several other pull requests, notes are on #3797.