…when PDS prepare is called #3026

- validation now without inheritance by introducing input validation
  support class
- renamed some classes - e.g. WrapperSkopeo -> SkopeoWrapper etc.
- changed tests for validation
- removed package prepare.prepare
- moved parts which were used only internally by implementations
  to abstract base class + changed visibility to protected only
- reduced amount of packages, technical parts like factory moved to
  semantic packages or to main prepare package if there are was
  no special semantic
- refactored tests to make easier to read - e.g. same setup parts
  to beforeEach method etc.

- log outputs reduced /enhanced
- integration test reconnection of executor configurations on local
  test restarts do now only load necessary data

- renamed ToolWrapper to AbstractToolWrapper
- fixed failure in javadoc of Scenario 22
- renamed some parts inside skopeo preparation module
- dropped getProcess() inside ProcessAdapter (avoid that anybody
  uses direct process access - all shall be done by adapter)
- removed pepare wrapper environment variable class, was not used
  any more
- extracted Git location converter and wrote tests
- url conversion method now returns an URL instead of a string

- replaced process builder call for cleanup on skopeo with
  java file api variant (delete auth file)
- skopeo now called with stdin input for password
- introduced process builder factory + tests
- process adapter supports now user input per stdin
- added test for process adapter support (stdin)
- moved logic for skopeo location conversion to own class
  (SkopeoLocationConverter) and wrote tests, afterwards
  implementation was changed

- introduced DirectoryAndFileSupport, wrote tests
- introduced AutoCleanupGitFilesFilter, wrote tests
- updated GitWrapperTest
- separated former git auto clean environment entry to
  KEY_PDS_PREPARE_MODULE_GIT_REMOVE_GIT_FILES_BEFORE_UPLOAD
  KEY_PDS_PREPARE_MODULE_GIT_CLONE_WITHOUT_GIT_HISTORY
- changed environment entries for skopeo as well, everything from
  a module is now prefixed "pds.prepare.module." etc.

- when git history is not wanted, the .git folder is now
  always removed
- additional gitfiles are treated extra
- pds config file in pds prepare solution has now the parameters
  inside as optional

- added PDS_WORKSPACE_AUTOCLEAN_DISABLED handling in deployment.yaml
  again

- dropped unnecessary class
- added missing licence header
- small refactoring inside DirectoryAndFileSupport