partial fix for GRAILS-9273 "DirectoryWatcher: files are incorrectly considered "new" if their extension wasn't watched for that directory"

Author: graemerocher

grails-core/src/main/groovy/org/codehaus/groovy/grails/compiler/GrailsProjectWatcher.java

@@ -146,8 +146,9 @@ public void onChange(File file) {
 
             public void onNew(File file) {
                 LOG.info("File [" + file + "] added. Applying changes to application.");
-                if (!file.getName().toLowerCase().endsWith(".properties")) {
-                    // only sleep for source files, not i18n files
+                String fileName = file.getName();
+                if (fileName.endsWith(".groovy") || fileName.endsWith(".java")) {
+                    // only wait a bit for source files to give the user a chance to make the class valid
                     sleep(5000);
                 }
                 compileIfSource(file);