[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/EncodingUtf8.java

@@ -2,6 +2,7 @@ class EncodingUtf8 {
 	String foo๑๑ = "\016\t\b ";
 	@java.lang.Override
 	@java.lang.SuppressWarnings("all")
+	@javax.annotation.Generated("lombok")
 	public java.lang.String toString() {
 		return "EncodingUtf8(foo๑๑=" + this.foo๑๑ + ")";
 	}