Address comment problems

Author: steverao

instrumentation/jsp-2.3/javaagent/build.gradle.kts

@@ -6,11 +6,12 @@ muzzle {
   pass {
     group.set("org.apache.tomcat")
     module.set("tomcat-jasper")
-    // version range [7.0.0,7.0.19) is missing from maven, can't add assertInverse
     // tomcat 10 uses JSP 3.0
     versions.set("[7.0.19,10)")
     // version 8.0.9 depends on org.eclipse.jdt.core.compiler:ecj:4.4RC4 which does not exist
     skip("8.0.9")
+    // can't add assertInverse.set(true)
+    // Because when muzzle check within the range [7.0.0, 7.0.19), it appears that org.eclipse.jdt.core.compiler:ecj:xx does not exist.
   }
 }
 

instrumentation/log4j/log4j-mdc-1.2/javaagent/build.gradle.kts

@@ -8,7 +8,7 @@ muzzle {
     module.set("log4j")
     versions.set("[1.2,)")
     // version 1.2.15 has a bad dependency on javax.jms:jms:1.1 which was released as pom only
-    skip("1.1.3", "1.2.15")
+    skip("1.2.15")
     assertInverse.set(true)
   }
 }

instrumentation/log4j/log4j-mdc-1.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/log4j/mdc/v1_2/Log4j1InstrumentationModule.java

@@ -5,19 +5,26 @@
 
 package io.opentelemetry.javaagent.instrumentation.log4j.mdc.v1_2;
 
+import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
 import static java.util.Arrays.asList;
 
 import com.google.auto.service.AutoService;
 import io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule;
 import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
 import java.util.List;
+import net.bytebuddy.matcher.ElementMatcher;
 
 @AutoService(InstrumentationModule.class)
 public class Log4j1InstrumentationModule extends InstrumentationModule {
   public Log4j1InstrumentationModule() {
     super("log4j-mdc", "log4j-mdc-1.2");
   }
 
+  @Override
+  public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
+    return hasClassesNamed("org.apache.log4j.MDC");
+  }
+
   @Override
   public List<TypeInstrumentation> typeInstrumentations() {
     return asList(new CategoryInstrumentation(), new LoggingEventInstrumentation());