Changes to incorporate the non-perfect crossing angle compensation

[davidlange6]

Pull requesting for Anders who has git technical problems

Fixes to the hourglass beam spot given discussions between Anders and Stephane Farthouk - expected luminous region is now 4.4 cm.

[cmsbuild]

A new Pull Request was created by @davidlange6 for CMSSW_6_2_X_SLHC.

Changes to incorporate the non-perfect crossing angle compensation

It involves the following packages:

IOMC/EventVertexGenerators

@cmsbuild, @civanch, @Degano, @mdhildreth, @nclopezo can you please review it and eventually sign? Thanks.
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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

Tested along with #2809.
Tests 10000, 10200, 10400, 11200, 11400, 11600, 11800, 12000, 12800 and 13000 pass all steps.
Tests 12200, 12400, 12600, 13200 and 13400 fail in step 2 with known errors.

[cmsbuild]

Pull request #2822 was updated. @cmsbuild, @civanch, @Degano, @mdhildreth, @nclopezo can you please check and sign again.