Several changes in Device:

- Multiple minor bug resolutions
- DeviceClient: solved logging bug
- EmulatedDriver: solved GetConfig bug and added event to prevent double connection requests
- DriverInstanceCache, DriverFactory: Added formatting of filter fields
- DataCache: solved minor bug
- DriverAPI test unit: corrected getconfig assertion check
- Device test unit: reimplemented, first complete test after component reworking
- DataCache/DeviceTools: solved several minor bugs
- DeviceServiceServicerImpl: added removal of drivers and endpoints when device is removed.