Check if the update deployment scripts failed on junit tenant and create tests

Because I don't see any code that triggers the execution of the deployment scripts after an **update running system** on the junit tenant**, I have to check if the deployment scripts are run when the following commands are executed:
````
ant updatesystem -Dtenant=junit
ant yunitupdate
````
And I have to create tests for these situations and the initialization. These tests can't be hybris integration tests

Start by examining the deployment-script execution paths used by `ant updatesystem -Dtenant=junit` and `ant yunitupdate`, along with the initialization path. Add tests covering script execution after an update and initialization without using Hybris integration tests; done means these situations are verified by the new tests.

Written by the indexing model from the issue text.