Allow OPTIONS request on the <xe:restService> component

[markleusink]

If the <xe:restService> control receives an OPTIONS request (which is kind of standard when doing REST), it immediately throws a 405 HTTP error. See also http://stackoverflow.com/questions/29478188/domino-cors-and-the-options-request. Would be great if the relevant classes could be changed to allow that: it doesn't even need any response, just the correct status code.

[edm00se]

It would be good to have that in the xe:restService, although it's probably worth mentioning that this is fully achievable if you implement the xe:restService via implementing a com.ibm.xsp.extlib.component.rest.CustomServiceBean, since you can/do manually check the request method.