upgrading to gatling 1.5.6 as a stop gap so QE jobs will run
Merge pull request #94 from mwbutcher/master

++1
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(QENG-803) Modify Gatling Perf tests to get load data from driver and master nodes

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#	Add a beaker job. Get the simid param. bugfix3

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#	Add perf monitoring

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#	Use newer version of log-level specification

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#	Use my beaker branch

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#	Reenable full run for final testing

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#	Use a separate beaker config if there is no gatling node

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#	Try code path w/o a gatling node specified

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#	Re-add the gatling agent host
Merge pull request #95 from doug-rosser/beakerize_sbt

(QENG-803) Modify Gatling Perf tests to get load data from driver and master nodes