comment out erlang server test (#6499)

Author: wing328

pom.xml

@@ -1409,7 +1409,7 @@
                 <module>samples/client/petstore/kotlin-moshi-codegen/</module>
                 <module>samples/client/petstore/kotlin-json-request-string/</module>
                 <!-- servers -->
-                <module>samples/server/petstore/erlang-server</module>
+                <!--<module>samples/server/petstore/erlang-server</module>-->
                 <module>samples/server/petstore/jaxrs/jersey2</module>
                 <module>samples/server/petstore/jaxrs/jersey2-useTags</module>
                 <module>samples/server/petstore/spring-mvc</module>