Update Vx3DHLTAnalyzer.cc

[cmsbuild]

I modified the definition of the greek letters, for example from \mu to #mu.
The reason is because I saw that the whole line, for example "\mu_{x} vs. Lumisection",
was written in italic, so I hope that "#mu_{x} vs. Lumisection" instead will be written
correctly.
Automatically ported from CMSSW_7_4_X #7702

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_7_5_X.

Update Vx3DHLTAnalyzer.cc

It involves the following packages:

DQM/BeamMonitor

@cmsbuild, @danduggan, @nclopezo, @deguio can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[deguio]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs unless changes or unless it breaks tests. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[nclopezo]

+1
Tests already approved in the equivalent of this PR in CMSSW_7_4_X

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[davidlange6]

+1