Use /proc/self/mounts instead of /etc/mtab

[Dr15Jones]

backport of #9541 which includes commit
30aa2a7

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_5_3_X.

It involves the following packages:

Utilities/StorageFactory

@cmsbuild, @smuzaffar, @Dr15Jones, @davidlange6 can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @wddgit this is something you requested to watch as well.
@davidlange6 you are the release manager for this.

cms-bot commands are listed here

[Dr15Jones]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/20768/console Started: 2017/06/19 22:27

[Dr15Jones]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_5_3_X IBs after it passes the integration tests and once validation in the development release cycle CMSSW_9_2_X is complete. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @smuzaffar

[cmsbuild]

+1
Tested at: c2c376e
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19374/20768/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19374/20768/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 9
• DQMHistoTests: Total histograms compared: 0
• DQMHistoTests: Total failures: 0
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 0
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• Checked 32 log files, 0 edm output root files, 9 DQM output files

[davidlange6]

+1