Removed analysis packages now maintained under the cms-btv-pog GitHub organization

[ferencek]

Backport of #1771. Removes

RecoBTag/ImpactParameterLearning
RecoBTau/JetTagMVALearning

analysis packages now maintained under the cms-btv-pog GitHub organization

[cmsbuild]

A new Pull Request was created by @ferencek (Dinko Ferencek) for CMSSW_6_2_X_SLHC.

Removed analysis packages now maintained under the cms-analysis GitHub organization

It involves the following packages:

RecoBTag/ImpactParameterLearning
RecoBTau/JetTagMVALearning

@nclopezo, @cmsbuild, @anton-a, @thspeer, @slava77, @Degano can you please review it and eventually sign? Thanks.
@pvmulder 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.
@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 #2505, #2507 and #2510 together. GEM test; extended pixel test; 3300, 3400, 4100, 4400, 40001, 50002, 60002, 4502, 4500, 5001 and 15001 all fine.