Disable flaky tests until IE issue is resolved

[floreks]

I'd propose to disable tests that fail on IE for now. I've investigated that and explained probable cause of that in #494. We should discuss that in there and find some solution.

@maciaszczykm @batikanu @bryk

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This change is

[codecov-io]

Current coverage is 85.99%

Merging #514 into master will not affect coverage as of d5fea1b

@@            master    #514   diff @@
======================================
  Files           95      95       
  Stmts          814     814       
  Branches         0       0       
  Methods          0       0       
======================================
  Hit            700     700       
  Partial          0       0       
  Missed         114     114       

Review entire Coverage Diff as of d5fea1b

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[batikanu]

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Review status: 0 of 2 files reviewed at latest revision, all discussions resolved.

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Comments from the review on Reviewable.io

[batikanu]

Reviewed 2 of 2 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from the review on Reviewable.io

[maciaszczykm]

We should make master green now and then search for a solution for it. LGTM

[bryk]

Yeah, thanks!