Switched to storing requests based on UUID, generalized UUIDIndexReducer to work with any type of index

src/app/core/shared/uuid.service.ts

@@ -0,0 +1,9 @@
+import { Injectable } from '@angular/core';
+import * as uuidv4 from 'uuid/v4';
+
+@Injectable()
+export class UUIDService {
+  generate(): string {
+    return uuidv4();
+  }
+}