Authentication freezes (white screen), when training job is running in the background

[sladomic]

Description:

• Capture at least one StudentImageCollectionEvent and after 30 seconds shut down the tablet (in this time the training background could not finish but the StudentImage were saved)
• Wait after the reboot until the AuthenticationActivity starts

Expected Result:

• The AuthenticationActivity starts normally

Actual Result:

• The AuthenticationActivity freezes (white screen) because the cpu intensive training background job also starts after reboot

Solution:

• Check in AuthenticationActivity, that the training background job is not running