Polish exception message

Author: sbrannen

spring-test/src/main/java/org/springframework/test/context/bean/override/convention/TestBeanBeanOverrideHandler.java

@@ -58,8 +58,8 @@ protected Object createOverrideInstance(String beanName, @Nullable BeanDefinitio
 			return this.factoryMethod.invoke(null);
 		}
 		catch (IllegalAccessException | InvocationTargetException ex) {
-			throw new IllegalStateException("Failed to invoke bean overriding method " + this.factoryMethod.getName() +
-					"; a static method with no formal parameters is expected", ex);
+			throw new IllegalStateException(
+					"Failed to invoke @TestBean factory method: " + this.factoryMethod, ex);
 		}
 	}