[SSSD] [sssd PR#947][comment] tests: fix race conditions in integration tests

[alexey-tikhonov]

URL: https://github.com/SSSD/sssd/pull/947
Title: #947: tests: fix race conditions in integration tests

alexey-tikhonov commented:
"""
> pbrezina force-pushed the pbrezina:fixtests

Looks like change of the value of this `/2` timeout is what actually fixes race. And this is exactly the approach that was used in #345...
"""

See the full comment at https://github.com/SSSD/sssd/pull/947#issuecomment-559767389