Review RTD Configuration Properties

Review RTD Configuration Properties

- split into 3 tables
- introduced CSV-file-defined tables for easier maintenance
- removed unnecessary 3PP properties definitions
- checked all custom properties still used and default values
- corrected some default values (sometime just wrong casing)
- updated application yaml spring.datasource.url so it has a default host value
- removed code-formatting for property values (except for URLS to prevent failing link-checks)
- added notes about using environment variables where applicable

Issue-ID: CPS-2596
Change-Id: I6f413dd726088ca8a002da145bf4f6c52a1c7b2a
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>