Avoid any escape chars in SOAP headers

CXF is escaping "<" chars into SOAP headers for the webservice workitem. A hack is needed to override this default behavior with an interceptor for configured elements.

New workitem param "RawElements" (comma-separated list string) will contain the elements that need to be skipped and added as they are (raw data without any escape char).

Ex: params.put("rawElements", "ContexteSession,endCity");

Where rawElements maps to "RawElements" inside WorkItemHandler.

Therefore, there should be a property "RawElements" with a string comma-separated list containing those xml elements to be skipped and added as they are (raw data).