Make MissingParameterNamesFailureAnalyzerTests more robust

Explicitly nullify `ParameterNameDiscovery` to simulate code that has
not been compiled with `-parameters`. Previously we were relying on an
initialization behavior that could change and break those tests.

Author: snicoll

core/spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/MissingParameterNamesFailureAnalyzerTests.java

@@ -94,6 +94,7 @@ private RuntimeException getSpringFrameworkMissingParameterException() throws Ex
 		MockResolver resolver = new MockResolver();
 		Method method = getClass().getDeclaredMethod("example", String.class);
 		MethodParameter parameter = new MethodParameter(method, 0);
+		parameter.initParameterNameDiscovery(null);
 		try {
 			resolver.resolveArgument(parameter, null, mock(NativeWebRequest.class), null);
 		}