Merge TrackerLayerIdAccessor to TrackerTopology

[makortel]

Migrate TrackerLayerIdAccessor to TrackerTopology by moving its functionality to TrackerTopology (following the suggestion of @venturia).

Tested in CMSSW_7_5_0_pre5, no changes expected in results.

@rovere @VinInn @venturia @boudoul

[cmsbuild]

A new Pull Request was created by @makortel (Matti Kortelainen) for CMSSW_7_5_X.

Merge TrackerLayerIdAccessor to TrackerTopology

It involves the following packages:

DataFormats/TrackerCommon
Geometry/TrackerGeometryBuilder
RecoHI/HiTracking
RecoPixelVertexing/PixelTriplets
RecoTracker/TkHitPairs
RecoTracker/TkSeedingLayers

@civanch, @Dr15Jones, @cvuosalo, @ianna, @mdhildreth, @cmsbuild, @slava77 can you please review it and eventually sign? Thanks.
@ghellwig, @echapon, @GiacomoSguazzoni, @jazzitup, @VinInn, @appeltel, @mschrode, @richard-cms, @yenjie, @rovere, @kurtejung, @gpetruc, @cerati, @yetkinyilmaz, @mandrenguyen, @dgulhan, @venturia this is something you requested to watch as well.
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[slava77]

@cmsbuild please test
(matrix tests will likely fail due to das problems)

[cmsbuild]

The tests are being triggered in jenkins.

[slava77]

@ianna
Hi Yana,
this is waiting for geometry signature.
Please check.
Thank you.

[cmsbuild]

+1
Tested at: d3f837b
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9449/10134/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9449/10134/summary.html