Added tests for ecj, fixed a few minor bugs that came out of that.

test/transform/resource/after-ecj/SetterPlain.java

@@ -0,0 +1,14 @@
+import lombok.Setter;
+class SetterPlain {
+  @lombok.Setter int i;
+  @Setter int foo;
+  SetterPlain() {
+    super();
+  }
+  public @java.lang.SuppressWarnings("all") void setI(final int i) {
+    this.i = i;
+  }
+  public @java.lang.SuppressWarnings("all") void setFoo(final int foo) {
+    this.foo = foo;
+  }
+}