test tweak: use ring-core-protocols for resource-response test

This way, we do not have to assume that Clojure sources are present in a JAR
on the classpath.

Signed-off-by: The-Alchemist <karl@digital-alchemy.io>

Author: The-Alchemist

ring-core/test/ring/util/test/response.clj

@@ -147,9 +147,10 @@
     (let [body (:body (resource-response "ring/util/response.clj"))]
       (is (instance? File body))
       (is (.startsWith (slurp body) "(ns ring.util.response")))
-    (let [body (:body (resource-response "clojure/java/io.clj"))]
+    (let [body (:body (resource-response
+                       "META-INF/maven/org.ring-clojure/ring-core-protocols/pom.properties"))]
       (is (instance? InputStream body))
-      (is (.contains (slurp body) "clojure.java.io"))))
+      (is (.contains (slurp body) "artifactId=ring-core-protocols"))))
 
   (testing "resource is a directory"
     (is (nil? (resource-response "/ring/assets"))))