Remove cout from MSLayersKeeperX0DetLayer

[Dr15Jones]

In addition to being against CMS policy, the cout was being flagged
as a thread safety issue by valgrind. Also, the printout was happening
once per stream not once per job.
If this functionality is actually needed then the MessageLogger should
be used.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_7_1_X.

Remove cout from MSLayersKeeperX0DetLayer

It involves the following packages:

RecoTracker/TkMSParametrization

@nclopezo, @cmsbuild, @anton-a, @thspeer, @slava77, @Degano can you please review it and eventually sign? Thanks.
@ghellwig, @GiacomoSguazzoni, @rovere, @gpetruc, @cerati, @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.
@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-3546/1135/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-3546/1135/summary.html

[slava77]

+1

for #3546 8ded66d

tested in CMSSW_7_1_X_2014-04-29-0200
(test area sign360 combined with pulls 3486 3530 3546 3548)
no regressions observed none expected

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). @nclopezo, @ktf can you please take care of it?