removed kotlin samples fro jenkins since this is working with Gradle 4

Author: HugoMario

pom.xml.jenkins

@@ -873,9 +873,11 @@
                 <module>samples/client/petstore/java/resteasy</module>
                 <module>samples/client/petstore/java/google-api-client</module>
                 <!--module>samples/client/petstore/java/rest-assured</module removed until errors found on #10120 be fixed -->
+                <!--
                 <module>samples/client/petstore/kotlin/</module>
                 <module>samples/client/petstore/kotlin-threetenbp/</module>
                 <module>samples/client/petstore/kotlin-string/</module>
+                -->
                 <!-- test non-java projects -->
                 <!-- module>samples/client/petstore/go</module removed until errors found on #10120 be fixed -->
                 <!-- servers -->