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

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

@@ -0,0 +1,56 @@
+class Setter1 {
+  @lombok.Setter boolean foo;
+  Setter1() {
+    super();
+  }
+  void setFoo(boolean foo) {
+  }
+}
+class Setter2 {
+  @lombok.Setter boolean foo;
+  Setter2() {
+    super();
+  }
+  void setFoo(String foo) {
+  }
+}
+class Setter3 {
+  @lombok.Setter String foo;
+  Setter3() {
+    super();
+  }
+  void setFoo(boolean foo) {
+  }
+}
+class Setter4 {
+  @lombok.Setter String foo;
+  Setter4() {
+    super();
+  }
+  void setFoo(String foo) {
+  }
+}
+class Setter5 {
+  @lombok.Setter String foo;
+  Setter5() {
+    super();
+  }
+  void setFoo() {
+  }
+}
+class Setter6 {
+  @lombok.Setter String foo;
+  Setter6() {
+    super();
+  }
+  void setFoo(String foo, int x) {
+  }
+}
+class Setter7 {
+  @lombok.Setter String foo;
+  Setter7() {
+    super();
+  }
+  static void setFoo() {
+  }
+}