Description Dirk Fauth 2019-11-14 09:31:45 EST

The following refactoring should be done on the migration code base to increase the maintainability and bring the code base to a current technology base:

- use Tycho 1.5 pomless builds
- contribute to the UI via E4 model fragments and make use of DI
- extract common code in test plugins to a common test plugin
- create a common helper class with static helper methods instead of helper class instances per plugin
- define model versions in an enumeration and provide helper methods to deal with version paths and centralize model version usage
- create a common namespace registry to avoid repeated namespace definitions
- use SLF4J API for logging and move Log4j specific code from plugins to a Log4j configuration fragment