Refactor DBSerializer verifyResourceVersion method
- assign variables closer to where they are used
- have a less complex validation logic
- rename related test cases to better understand what they are doing
- add further test cases (this would actually be better covered via a parameterized test)
- rename DBSerializer variable in test cases to better match whith the name of the type it's representing
Issue-ID: AAI-3657
Signed-off-by: Fiete Ostkamp <Fiete.Ostkamp@telekom.de>
Change-Id: Id7976b0123c17178845db115c09b5c00d2361e6d