Review Request 17724: Add an exception catch to provide a better error message when distributed command runner fails due to un-specified executor parameters in the slave configurations.

[Mark Chu-Carroll]

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https://reviews.apache.org/r/17724/
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Review request for Aurora, Kevin Sweeney and Brian Wickman.


Bugs: aurora-128
    https://issues.apache.org/jira/browse/aurora-128


Repository: aurora


Description
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Add an exception catch to provide a better error message when distributed 
command runner fails due to un-specified executor parameters in the slave 
configurations.


Diffs
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  src/main/python/apache/aurora/client/api/command_runner.py 
c645e9556b50b332cc5a298ceee3d9188a68a727 
  src/test/python/apache/aurora/client/commands/test_run.py 
abcc275d57373038227d3805c16b17b967f92048 

Diff: https://reviews.apache.org/r/17724/diff/


Testing
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Manual testing on the command line.


Thanks,

Mark Chu-Carroll