Fix errors from using published datasets

[hroskes]

This pull request fixes two errors in the All In One Validation Tool's interface to DAS, which currently does not function at all, requiring an extra step in specifying the data files to use.

[cmsbuild]

A new Pull Request was created by @hroskes (Heshy Roskes) for CMSSW_7_3_X.

Fix errors from using published datasets

It involves the following packages:

Alignment/OfflineValidation

@diguida, @cerminar, @cmsbuild, @nclopezo, @rcastello, @mmusich can you please review it and eventually sign? Thanks.
@ghellwig, @mmusich, @frmeier, @tlampen this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@nclopezo you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[cmsbuild]

+1
Tested at: 6741210
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6429/915/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6429/915/summary.html

[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, @ktf, @smuzaffar

[davidlange6]

+1