Add samples to test jaxrs spec (withXml option enabled) #690

Job	Run time
Build JAX-RS (samples/server/petstore/jaxrs-jersey)	1m 3s
Build JAX-RS (samples/server/petstore/jaxrs/jersey2-useTags)	51s
Build JAX-RS (samples/server/petstore/jaxrs-spec)	52s
Build JAX-RS (samples/server/petstore/jaxrs-spec-withxml)	41s
Build JAX-RS (samples/server/petstore/jaxrs-spec-interface)	43s
Build JAX-RS (samples/server/petstore/jaxrs-spec-interface-response)	40s
Build JAX-RS (samples/server/petstore/jaxrs/jersey2)	41s
Build JAX-RS (samples/server/petstore/jaxrs-datelib-j8)	42s
Build JAX-RS (samples/server/petstore/jaxrs-resteasy/eap-java8)	52s
Build JAX-RS (samples/server/petstore/jaxrs-cxf)	37s
Build JAX-RS (samples/server/petstore/jaxrs-resteasy/default)	45s
Build JAX-RS (samples/server/petstore/jaxrs-resteasy/joda)	56s
Build JAX-RS (samples/server/petstore/jaxrs-resteasy/eap-joda)	59s
Build JAX-RS (samples/server/petstore/jaxrs-resteasy/eap)	58s
Build JAX-RS (samples/server/petstore/jaxrs-cxf-non-spring-app)	1m 3s
Build JAX-RS (samples/server/petstore/jaxrs-spec-microprofile-openapi-annotations)	1m 10s
Build JAX-RS (samples/server/petstore/jaxrs-cxf-annotated-base-path)	56s
Build JAX-RS (samples/server/petstore/jaxrs-cxf-cdi)	57s
	15m 26s

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