Remove sauce access keys from travis config

[bryk]

With that tests on sauce will not run on devs' forks, which will
hopefully make them less flaky.

I've added the key to travis config variable and made publicly
available.

Partially addresses: #494

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This change is

[bryk]

@digitalfishpond Can you review?

[maciaszczykm]

@bryk Denis will be back in the office next week.

[bryk]

Oh yeah. I forgot. Can you review?

[codecov-io]

Current coverage is 86.89%

Merging #593 into master will not affect coverage as of 153d456

@@            master    #593   diff @@
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  Files          102     102       
  Stmts          870     870       
  Branches         0       0       
  Methods          0       0       
======================================
  Hit            756     756       
  Partial          0       0       
  Missed         114     114       

Review entire Coverage Diff as of 153d456

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[maciaszczykm]

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Reviewed 1 of 1 files at r1, 1 of 1 files at r3.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from the review on Reviewable.io

[bryk]

@rf232 Do you propose that we roll this back?

[rf232]

It is a bit tricky that the pull requests have other tests than the merged
CL, but when I enabled all sauce tests the protractor tests gave some
problems so while I'd love to roll this back we should take a closer look
at it.

Rob

On Thu, Nov 3, 2016 at 6:21 PM, Piotr Bryk [email protected] wrote:

@rf232 https://github.com/rf232 Do you propose that we roll this back?

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[bryk]

I think as long as we're on saucelabs and travis this will be flaky. I hope that we'll be able to move to a dedicated jenkins in q1 that will solve the issues we have.