[go-migration] Multiple supply/finalize hollow unit tests exist

[kiril-keranov]

It appears there is currently a set of unit tests for the supply/finalize phases in the go-based java buildpack that actually test nothing. For example like this one Such tests expect certain stuff that is already created in the BeforeEach(..) of all the tests so the test passes always successfully as no real supply(..) or finalize(..) functionalities were triggered during its execution.