Do not export trashed items (#241)

* Do not export trashed items

* Test Item exporting

Does not test organization export. Export's use of apiService is not
very testable. We will either need a testApiService or to refactor
apiService to make mocking easier.

* Linter fixes

spec/utils.ts

@@ -0,0 +1,16 @@
+function newGuid() {
+    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+        // tslint:disable:no-bitwise
+        const r = Math.random() * 16 | 0;
+        const v = c === 'x' ? r : (r & 0x3 | 0x8);
+        return v.toString(16);
+    });
+}
+
+export function GetUniqueString(prefix: string = '') {
+    return prefix + '_' + newGuid();
+}
+
+export function BuildTestObject<T, K extends keyof T = keyof T>(def: Partial<Pick<T, K>> | T, constructor?: (new () => T)): T {
+    return Object.assign(constructor === null ? {} : new constructor(), def) as T;
+}