[Kotlin] Fix invalid gradlew.bat templates #244

Job	Run time
Build Kotlin server (samples/server/petstore/kotlin-springboot)	1m 33s
Build Kotlin server (samples/server/petstore/kotlin-springboot-bigdecimal-default)	1m 32s
Build Kotlin server (samples/server/petstore/kotlin-springboot-delegate)	1m 23s
Build Kotlin server (samples/server/petstore/kotlin-springboot-modelMutable)	1m 28s
Build Kotlin server (samples/server/petstore/kotlin-springboot-reactive)	1m 17s
Build Kotlin server (samples/server/petstore/kotlin-springboot-source-swagger1)	1m 19s
Build Kotlin server (samples/server/petstore/kotlin-springboot-source-swagger2)	1m 31s
Build Kotlin server (samples/server/petstore/kotlin-springboot-springfox)	1m 20s
Build Kotlin server (samples/server/petstore/kotlin-server/ktor)	1m 27s
Build Kotlin server (samples/server/petstore/kotlin-server/jaxrs-spec)	48s
Build Kotlin server (samples/server/petstore/kotlin-server/jaxrs-spec-mutiny)	34s
Build Kotlin server (samples/server/petstore/kotlin-server-modelMutable)	1m 22s
Build Kotlin server (samples/server/petstore/kotlin-server/javalin)	1m 37s
Build Kotlin server (samples/server/others/kotlin-server/jaxrs-spec)	38s
Build Kotlin server (samples/server/others/kotlin-server/jaxrs-spec-array-response)	46s
Build Kotlin server (samples/server/petstore/kotlin-spring-cloud)	1m 24s
	19m 59s

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