Suppress internal exceptions in tomcat stacktraceleak detection (#7488)

Author: smola

dd-java-agent/instrumentation/tomcat-appsec-7/src/main/java/datadog/trace/instrumentation/tomcat7/ErrorReportValueAdvice.java

@@ -15,7 +15,7 @@
 
 public class ErrorReportValueAdvice {
 
-  @Advice.OnMethodEnter(skipOn = Advice.OnNonDefaultValue.class)
+  @Advice.OnMethodEnter(suppress = Throwable.class, skipOn = Advice.OnNonDefaultValue.class)
   public static boolean onEnter(
       @Advice.Argument(value = 1) Response response,
       @Advice.Argument(value = 2) Throwable throwable,