Use test specs to reduce same size (java resttempalte clients) #914

Job	Run time
Build Java Client JDK17 (samples/client/petstore/java/resttemplate-springBoot4-jackson3)	2m 20s
Build Java Client JDK17 (samples/client/petstore/java/restclient)	2m 54s
Build Java Client JDK17 (samples/client/petstore/java/webclient-jakarta)	2m 18s
Build Java Client JDK17 (samples/client/petstore/java/restclient-springBoot4-jackson2)	2m 19s
Build Java Client JDK17 (samples/client/petstore/java/restclient-useSingleRequestParameter-static)	2m 32s
Build Java Client JDK17 (samples/client/petstore/java/restclient-useSingleRequestParameter)	2m 58s
Build Java Client JDK17 (samples/client/petstore/java/restclient-nullable-arrays)	2m 24s
Build Java Client JDK17 (samples/client/petstore/java/restclient-swagger2)	2m 57s
Build Java Client JDK17 (samples/client/petstore/java/restclient-springBoot4-jackson3)	2m 26s
Build Java Client JDK17 (samples/client/petstore/java/resttemplate-jakarta)	2m 5s
Build Java Client JDK17 (samples/client/others/java/webclient-sealedInterface)	2m 14s
Build Java Client JDK17 (samples/client/petstore/java/resttemplate-springBoot4-jackson2)	2m 19s
Build Java Client JDK17 (samples/client/others/java/webclient-sealedInterface_3_1)	1m 54s
Build Java Client JDK17 (samples/client/others/java/restclient-enum-in-multipart)	2m 12s
Build Java Client JDK17 (samples/client/petstore/java/webclient-useSingleRequestParameter)	2m 27s
	36m 19s

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