Handle intermittently failing unit test
Handle intermittently failing unit test

Sometimes, the worker tick does not complete the changes when
running amongst the other unit tests. Catch this V1 issue and
repeat the worker tick.

Change-Id: Ifcf07195215a2d31d4689dbeb6f5e02fc3c727d0

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server