Increase code coverage in cps-service module

- After last rebase I had to remove 3 unused recent cloud eventd specific exceptions/constructors
- Moved the only used new exception from SPI to the relevant util package
(please NOTE not all exceptions belong in SPI and always question need for new exception
when there is no specific handling, try to use standard or existign CPS exception instead!)
- Increased cps-service module (line) coverage from 95 to 100%
- Added tests for missing exceptions (handling i.e. thrown up)
- Removed incorrect SPI defined OperationNotYetSupportedException
(replaced with standard java exception instead)
- Fixed some legacy issues with existign test classes I modified
(unnecessary setup, conventions etc)
- Increased coverage for DataNodeBuilder
- Added or modified test to include more spi models
- Added tests for Hazelcast Configs
- Added more tests for json object mapper
- Added test and fixed error handling in YangUtils/XmlFileUtils
(it was incorrectly converting a config exception to a data validation exception)

Issue-ID: CPS-475
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: I5852ba01bc5b33ae361b8f29daae9868f05baa35