Allow child adapters specify special xhr keys

This is necessary for the namespace query param

ui/app/adapters/job.js

@@ -46,6 +46,18 @@ export default Watchable.extend({
     return url;
   },
 
+  xhrKey(url, method, options = {}) {
+    const namespace = options.data && options.data.namespace;
+    if (namespace) {
+      return `${url}?namespace=${namespace}`;
+    }
+    return url;
+  },
+
+  relationshipFallbackLinks: {
+    summary: '/summary',
+  },
+
   findAllocations(job) {
     const url = `${this.buildURL('job', job.get('id'), job, 'findRecord')}/allocations`;
     return this.ajax(url, 'GET', { data: this.buildQuery() }).then(allocs => {

ui/app/adapters/watchable.js

@@ -13,30 +13,34 @@ export default ApplicationAdapter.extend({
     return {};
   }),
 
-  ajaxOptions(url) {
+  ajaxOptions() {
     const ajaxOptions = this._super(...arguments);
+    const key = this.xhrKey(...arguments);
 
     const previousBeforeSend = ajaxOptions.beforeSend;
     ajaxOptions.beforeSend = function(jqXHR) {
       if (previousBeforeSend) {
         previousBeforeSend(...arguments);
       }
-      this.get('xhrs')[url] = jqXHR;
+      this.get('xhrs')[key] = jqXHR;
       jqXHR.always(() => {
-        delete this.get('xhrs')[url];
+        delete this.get('xhrs')[key];
       });
     };
 
     return ajaxOptions;
   },
 
+  xhrKey(url /* method, options */) {
+    return url;
+  },
+
   findAll(store, type, sinceToken, snapshotRecordArray, additionalParams = {}) {
     const params = assign(this.buildQuery(), additionalParams);
     const url = this.urlForFindAll(type.modelName);
 
     if (get(snapshotRecordArray || {}, 'adapterOptions.watch')) {
       params.index = this.get('watchList').getIndexFor(url);
-      this.cancelFindAll(type.modelName);
     }
 
     return this.ajax(url, 'GET', {