RPC efficiency distribution bugfix (backport #8881)

[jhgoh]

Backport of #8881 to 73X release, bugfix of RPC efficiency plot.

[cmsbuild]

A new Pull Request was created by @jhgoh (Junghwan John Goh) for CMSSW_7_3_X.

RPC efficiency distribution bugfix (backport #8881)

It involves the following packages:

DQM/RPCMonitorClient

@cmsbuild, @danduggan, @nclopezo, @deguio can you please review it and eventually sign? Thanks.
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[cmsbuild]

+1
Tested at: 62cbb3d
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8883/4419/summary.html

[cmsbuild]

+1
Tested at: 62cbb3d
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8883/4438/summary.html

[deguio]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_3_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @smuzaffar

[davidlange6]

+1