XliffFFS: Validation and bug fix for xmlns

Change-Id: I98d83b8e1f4622753fe9cc284a7b1004316ef481
Handle CDATA escaping in XliffFFS

Change-Id: Iede4fe8f1288ca51e92122eabe9ad8c5792457f0
Merge changes Iede4fe8f,I98d83b8e

* changes:
  Handle CDATA escaping in XliffFFS
  XliffFFS: Validation and bug fix for xmlns