Add retries to flaky multiroot semaphores tests.

[Mati365]

Suggested merge commit message (convention)

Tests: Add retry option to flaky multiroot test, extend delay between assertions. Tests: Randomize the order of the tests, to prevent incorrect dependencies across tests.

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Additional information

This test tests quite rare scenario when setData is being called when editor is not initialized. In theory - it is possible, but I haven't managed to reproduce this in the real world. At this moment, there were no reports about incorrect behavior, so it's safe enough to retry it a few times.

[coveralls]

Pull Request Test Coverage Report for Build 934960b4-11e8-492d-a92b-e3dc929f3348

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build a29952f7-4ab2-4d09-a6e5-b1888419d034:	0.0%
Covered Lines:	591
Relevant Lines:	591

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💛 - Coveralls