Type safety on jdl to json converters #30018

Job	Run time
build-matrix	7s
vue-default (n20.13.1/j17)	1m 35s
vue-default-additional (n20/j21)	1m 14s
vue-noi18n-mysql-ws-oauth2 (n20/j21)	1m 31s
vue-fulli18n-mysql-es (n20/j17)	1m 27s
vue-gradle-h2mem-ws-session (n20.13.1/j21)	1m 35s
vue-h2disk-ws-theme (n20.13.1/j17)	1m 19s
vue-session-cassandra-fr (n20.13.1/j17)	1m 10s
ms-mf-vue-consul-oauth2-mysql-memcached (n20.13.1/j17)	1m 40s
stack-vue-no-db (n20.13.1/j17)	1m 32s
check-vue	1s
	13m 11s

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