Adding JetMETCorrections/JetCorrector to analysis.

Fix cms-sw/cmssw#5442.
Merge pull request #227 from smuzaffar/master

use new pkgtools tag for 74devel
Set up IBs for CMSSW_7_4_THREADED_X
Merge pull request #228 from nclopezo/add-74-threaded-ibs

Set up IBs for CMSSW_7_4_THREADED_X
Enable slc5 PR testing for CMSSW_5_3_X.

This is to test if we can run on the dockerized mesos slave running
slc5 ontop of slc6. If this works we can actually claim more resources
to slc6.
Improve printout of what was done / errors.
Merge pull request #221 from ktf/new-package

Adding JetMETCorrections/JetCorrector to analysis.
Merge pull request #229 from ktf/master

Misc improvements.
Set up IBs for CMSSW_7_4_ROOT6_X
Merge pull request #230 from nclopezo/add-74-root6-ibs

Set up IBs for CMSSW_7_4_ROOT6_X
Only use kinit / aklog if they are present.

Assume we have a local installation otherwise.
Use https for git clone.

Reccomended by Github.
Merge pull request #231 from ktf/master

Misc cleanups to PR testing.
Do not assume scripts are in $WORKSPACE.
Merge pull request #232 from ktf/master

Do not assume scripts are in $WORKSPACE.
Setup IBs for CMSSW_7_4_GEANT10_X
Merge pull request #233 from nclopezo/add-74-geant10-ibs

Setup IBs for CMSSW_7_4_GEANT10_X
Disable CMSSW_7_3_DEVEL_X and CMSSW_7_3_GEANT10_X IBs
Merge pull request #234 from nclopezo/disable-73-geant10-devel

Disable CMSSW_7_3_DEVEL_X and CMSSW_7_3_GEANT10_X IBs
move icc build to 74x