- usecases for asset CRUD operations
- AssertFile entity + DB parts
- assert service
- TestUtil enhanced, now a dedicated sub folder can be defined
  for temporary files
- implemented asset storages (+ AbstractSharedVolumeStorage)
- introduced asset storage factories

- formatted code
- wrote unit tests
- wrote integration test
- wrote DB tests
- wrote RESTdoc tests
- implemented logic inside asset service
- wrote DAUI actions
- added missing license headers

- it is now ensured on every pds job call, that the assets in storage
  are same as in db. Same logic for admin create/update operation is
  used.
- improved PDSWebScanJobScenario12IntTest which does now uses templates
  and assets. The test ensures that the PDS instance will receive
  the pds template meta data.
- changed templateDefinition format. Assets now no longer an array
  but only one entry. Means we have 1:n relation here from
  asset to templates and no longer m:n.
- added unit tests
- introduced TemplateData resolver in commons-model which can be
  used from PDS and wrapper applications
- introduced TemplateData inside SecHub convfiguration file
- Template and Asset REST controller are now annotated with profile
  admin access

- introduced TestAPI.executeResilient which is a short term for
  executeRunnableAndAcceptAssertionsMaximumTimes(4, runnable, 500);
- all time relevant parts inside integration test
  TemplateScenario1IntTest do now use this for testing

- introduced new usecase for PDS job execution
  (makes it easier for developers to find the relevant parts)