Fix postProcessXml overriding string parameter name in test and javadoc

Author: mauromol

core/src/main/java/com/onelogin/saml2/authn/AuthnRequest.java

@@ -119,7 +119,7 @@ public AuthnRequest(Saml2Settings settings, AuthnRequestParams params) {
 		LOGGER.debug("AuthNRequest --> " + authnRequestString);
 	}
 
-	/*
+	/**
 	 * Allows for an extension class to post-process the AuthnRequest XML generated
 	 * for this request, in order to customize the result.
 	 * <p>

core/src/test/java/com/onelogin/saml2/test/authn/AuthnRequestTest.java

@@ -524,8 +524,8 @@ public void testPostProcessXml() throws Exception {
 		Saml2Settings settings = new SettingsBuilder().fromFile("config/config.min.properties").build();
 		AuthnRequest authnRequest = new AuthnRequest(settings) {
 			@Override
-			protected String postProcessXml(String authRequestXml, AuthnRequestParams params, Saml2Settings sett) {
-				assertEquals(authRequestXml, super.postProcessXml(authRequestXml, params, sett));
+			protected String postProcessXml(String authnRequestXml, AuthnRequestParams params, Saml2Settings sett) {
+				assertEquals(authnRequestXml, super.postProcessXml(authnRequestXml, params, sett));
 				assertSame(settings, sett);
 				return "changed";
 			}