Prevent printing "AOT mode disabled" during test code generation

Closes gh-1332

Author: sdeleuze

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

@@ -277,6 +277,8 @@ public void visitInsn(int opcode) {
 					mv.visitMethodInsn(INVOKEVIRTUAL, "org/springframework/boot/SpringApplication", "setInitializers", "(Ljava/util/Collection;)V", false);
 					mv.visitJumpInsn(GOTO, end);
 					mv.visitLabel(elseClause);
+					mv.visitMethodInsn(INVOKESTATIC, "org/springframework/nativex/AotModeDetector", "isGeneratingAotTests", "()Z", false);
+					mv.visitJumpInsn(IFNE, end);
 					mv.visitFieldInsn(GETSTATIC, "org/springframework/boot/SpringApplication", "logger",
 							"Lorg/apache/commons/logging/Log;");
 					mv.visitLdcInsn("AOT mode disabled");

spring-native/src/main/java/org/springframework/nativex/AotModeDetector.java

@@ -52,8 +52,13 @@ public static boolean isAotModeEnabled() {
 		}
 		return false;
 	}
+
 	public static boolean isRunningAotTests() {
 		return generatedTestClassPresent && !aotTestClassPresent;
 	}
 
+	public static boolean isGeneratingAotTests() {
+		return aotTestClassPresent;
+	}
+
 }

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

@@ -126,7 +126,7 @@ else if (AotModeDetector.isAotModeEnabled()) {
 			initializers.addAll((Collection)getSpringFactoriesInstances(ApplicationContextInitializer.class));
 			setInitializers(initializers);
 		}
-		else {
+		else if (!AotModeDetector.isGeneratingAotTests()) {
 			logger.info("AOT mode disabled");
 			setInitializers((Collection) getSpringFactoriesInstances(ApplicationContextInitializer.class));
 		}