Update of GEM validation code

[dildick]

Mostly clean-up of the code

[cmsbuild]

A new Pull Request was created by @dildick (Sven Dildick) for CMSSW_6_2_X_SLHC.

Update to GEM validation code

It involves the following packages:

Validation/MuonGEMDigis
Validation/MuonGEMHits

The following packages do not have a category, yet:

Validation/MuonGEMDigis
Validation/MuonGEMHits

@cmsbuild, @Degano, @ktf, @nclopezo can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@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

Tests 10000, 10200, 10400, 11200, 11400, 12000, 12800, 13000, 13600 and 14600 pass all steps.
Tests 12200, 12400, 12600, 13800, 14000, 14200 and 14400 fail in step 2 with known errors.