fix(service): Custom getRestangularUrl() and getRequestUrl() - #1216

[nonplus]

fix(service): Custom getRestangularUrl() and getRequestUrl() - #1216

[bostrom]

@nonplus Thanks! Can you describe what this PR is about and why we need it?

[nonplus]

It addresses the problem described in #1216.

Personally, I want to be able to (periodically) re-fetch a Restangular resource. I should be able to do something like this:

RestangularProvider.setOnElemRestangularized((elem, isCollection) => {
	if (!isCollection) {
		elem["fetch"] = function() {
			return this.get(this.reqParams);
		};
		elem["refresh"] = function() {
			return this.fetch()
				.then(value => angular.copy(value, this));
		};

	}
	return elem;
});

This works fine for one/all resources, but doesn't work for resources returned by customGET("path") or methods added via addRestangularMethod("methodName", "GET", "path") because Restangular incorrectly doesn't include "path" in the URL used by get().