Host does not resolve when the start of the path is the same string as the namespace.

[andrew-paterson]

I'm using Ember 3.1.2, and ember-ajax 3.0.0.

Assuming I'm serving my Ember app at localhost:4200 and have the namespace and host configured as follows:

// services/ajax
namespace: '/foo',
host: `https://test.com`,

If I then call

this.get('ajax').request('/foobar/posts');

the host and namespace are not added to the request URL which becomes

localhost:4200/foobar/posts

where it should be

https://test.com/foo/foobar/posts.