Fix tbb4py test sporadic fails

[isaevil]

Signed-off-by: Isaev, Ilya [email protected]

Description

There are sporadic fails with tbb4py test (test.py). The problem is that some test cases rely on the fact, that submitted async work will not finish until calling get with timeout. To do there is a call for time.sleep in functor submitted. Sporadically, expected result is not happening (like OSX example in issue) so to prevent that, the blocking is used.

Fixes #377

• [x] - git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details)

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• [x] bug fix - change that fixes an issue
• [ ] new feature - change that adds functionality
• [x] tests - change in tests
• [ ] infrastructure - change in infrastructure and CI
• [ ] documentation - documentation update

Tests

• [ ] added - required for new features and some bug fixes
• [x] not needed

Documentation

• [ ] updated in # - add PR number
• [ ] needs to be updated
• [x] not needed

Breaks backward compatibility

• [ ] Yes
• [x] No
• [ ] Unknown

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