Added Jest result error message in case of create index exception

[totojack]

Added Jest result error message in case of create index exception, to better understand creation error cause.

[ConfluentJenkins]

Can one of the admins verify this patch?

[ghost]

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[totojack]

[clabot:check] 2017-04-11 14:45 GMT+02:00 Confluent CLA Bot <notifications@github.com>:

…

It looks like @totojack <https://github.com/totojack> hasn't signed our *C*ontributor *L*icense *A*greement, yet. The purpose of a CLA is to ensure that the guardian of a project's outputs has the necessary ownership or grants of rights over all contributions to allow them to distribute under the chosen licence. Wikipedia <http://en.wikipedia.org/wiki/Contributor_License_Agreement> You can read and sign our full Contributor License Agreement here <http://clabot.confluent.io/cla>. Once you've signed reply with [clabot:check] to prove it. Appreciation of efforts, clabot — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#79 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABJijWlaj9P9vU-PTB4hn02RN_QQ72tgks5ru3XRgaJpZM4M6C4o> .

[ghost]

@confluentinc It looks like @totojack just signed our Contributor License Agreement. 👍

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clabot

[levzem]

Hi @totojack, looks like we already improved the log message in a similar way in #169 , but thank you for your contribution!

Closing this, but feel free to reopen this if you have any questions