[i623] added eclipse code for generating @javax.annotation.Generated, and refactored java impl to reduce DRY violations. -f pretty now includes skipping generation of this annotation, and updated ALL the test cases.

test/transform/resource/after-delombok/NonNullWithAlternateException.java

@@ -8,6 +8,7 @@ public class NonNullWithAlternateException {
 		System.out.println(arg);
 	}
 	@java.lang.SuppressWarnings("all")
+	@javax.annotation.Generated("lombok")
 	public void setTest(@lombok.NonNull final String test) {
 		if (test == null) {
 			throw new java.lang.IllegalArgumentException("test is null");