Add castor geometry files with position for 2015

[cbaus]

This PR is complementary to the other two recent PRs for CASTOR (#10259, #10216).
The changed add 3 castor.xml files:

1. One with the measured position by the positioning sensors
2. Same as (1) plus an upward shift within the sys uncertainty
3. Same as (2) but with downward shift.

The files are in separate folders. Hope this is OK but simple renaming could not be done because of the namespace "castor:" used by DDL.

FSQ Group wants to request simulations with these files.
Thank you.

[cmsbuild]

A new Pull Request was created by @cbaus for CMSSW_7_6_X.

Add castor geometry files with position for 2015

It involves the following packages:

Geometry/ForwardCommonData

@cmsbuild, @civanch, @Dr15Jones, @ianna, @mdhildreth can you please review it and eventually sign? Thanks.
@ghellwig 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.
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@Degano you are the release manager for this.
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[ianna]

@cmsbuild - please test

[ianna]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/8767/console

[cmsbuild]

+1
Tested at: a9da6fa
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11730/8767/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11730/8767/summary.html

[ianna]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_6_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar