jira and tim -connector: Refactoring OrderCRUDController and other improvements

- OrderCRUDController refactored
- Save or update for OrderSyncInfo instead of creating new instance for each sync
- Name change for TimImpExpInfo to SynchronizationInfo
- JiraSyncInfo is removed instead SynchronizationInfo is used
- All files which are affected by name changes are modified
- Translations added where applicable
- clean up unused variables etc