Revert unwanted changes in gcc brought by automatic merges

Branches IB/CMSSW_7_3_X/stable and IB/CMSSW_7_4_X/gcc481 should be identical.
Because IB/CMSSW_7_4_X/stable has gcc491, the automatic merges brought to IB/CMSSW_7_4_X/gcc481 unwanted gcc changes. 

https://github.com/cms-sw/cmsdist/compare/IB/CMSSW_7_3_X/stable...IB/CMSSW_7_4_X/gcc481
This pull request reverts the difference. 
Notice that in the comparison there are 6 files changed with  with 75 additions and 27,583 deletions.
This pull request modifies those 6 files with 27,583 additions and 75 deletions.

if you compare the nclopezo:revert-unwanted-gcc-changes-74-481 with IB/CMSSW_7_3_X/stable, there are no changes:

https://github.com/nclopezo/cmsdist/compare/cms-sw:IB/CMSSW_7_3_X/stable...nclopezo:revert-unwanted-gcc-changes-74-481