Update Tomcat substitutions to allow controlling JMX support

Closes gh-935

Author: sdeleuze

spring-aot/src/main/java/org/springframework/aot/factories/CodeGenerator.java

@@ -66,6 +66,9 @@ public CodeGenerator(AotOptions aotOptions) {
 		if (aotOptions.isRemoveSpelSupport()) {
 			staticBlock.addStatement("System.setProperty(\"spring.spel.ignore\", \"true\")");
 		}
+		if (!aotOptions.isRemoveJmxSupport()) {
+			staticBlock.addStatement("System.setProperty(\"spring.jmx.ignore\", \"false\")");
+		}
 
 		// Make sure we take the native codepath even on the JVM, can be useful with the tracing agent
 		// TODO Allow to disable it via a flag

spring-native/src/main/java/org/springframework/nativex/substitutions/RemoveJmxSupport.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2019-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.nativex.substitutions;
+
+import java.util.function.BooleanSupplier;
+
+public class RemoveJmxSupport implements BooleanSupplier {
+
+	@Override
+	public boolean getAsBoolean() {
+		return Boolean.valueOf(System.getProperty("spring.jmx.ignore", "true"));
+	}
+
+}

spring-native/src/main/java/org/springframework/nativex/substitutions/micrometer/Target_TomcatMetrics.java

@@ -18,6 +18,7 @@
 
 import org.springframework.nativex.substitutions.CatalinaManagerIsAround;
 import org.springframework.nativex.substitutions.OnlyIfPresent;
+import org.springframework.nativex.substitutions.RemoveJmxSupport;
 
 import com.oracle.svm.core.annotate.Substitute;
 import com.oracle.svm.core.annotate.TargetClass;
@@ -30,7 +31,7 @@
  * @author Andy Clement
  */
 @TargetClass(className = "io.micrometer.core.instrument.binder.tomcat.TomcatMetrics", 
-    onlyWith = {OnlyIfPresent.class, CatalinaManagerIsAround.class})
+    onlyWith = {OnlyIfPresent.class, CatalinaManagerIsAround.class, RemoveJmxSupport.class})
 final class Target_TomcatMetrics {
 
 	@Substitute

spring-native/src/main/java/org/springframework/nativex/substitutions/tomcat/Target_Registry.java

@@ -22,9 +22,10 @@
 import org.apache.tomcat.util.modeler.Registry;
 
 import org.springframework.nativex.substitutions.OnlyIfPresent;
+import org.springframework.nativex.substitutions.RemoveJmxSupport;
 
 // To avoid Registry instantiation and JmxMBeanServer usage
-@TargetClass(className = "org.apache.tomcat.util.modeler.Registry", onlyWith = { OnlyIfPresent.class })
+@TargetClass(className = "org.apache.tomcat.util.modeler.Registry", onlyWith = { OnlyIfPresent.class, RemoveJmxSupport.class })
 final class Target_Registry {
 
 	@Alias