fix test

Author: zeitlinger

all/src/test/java/io/opentelemetry/all/SdkDesignTest.java

@@ -71,6 +71,10 @@ public boolean test(JavaMethod input) {
         parents.addAll(input.getOwner().getAllRawInterfaces());
 
         for (JavaClass parent : parents) {
+          if (parent.getPackageName().contains(".internal.")) {
+            continue;
+          }
+
           Optional<JavaMethod> found = parent.tryGetMethod(name, paramsType);
           if (found.isPresent()) {
             return true;