* Separation of node health and initialization state from rln_relay status. Make (only) health endpoint avail early and install others in the last stage of node setup.
* Proper json report from /health, adjusted and fixed test, added convenient script for checking node health
* Stop wakunode2 if configured rest server cannot be started
* Fix wakuRlnRelay protocol existence check
* Fix typo
* Removed unused imports from touched files.
* Added missing /health test for all
* Allow text/plain content type descriptor for json formatted content body. Refactored duplicated encode/decode functions for rest api
* Fix relay endpoint decodings of content bodies to accept text/plain
* Added support for content body decoder for checking media type if additional parameters are present
* Fix wrong usage of ContentTypeData - appeared only for tests