Renamed test directory to match the query name

Co-Authored-By: Asger F <316427+asgerf@users.noreply.github.com>

javascript/ql/test/query-tests/Quality/UnhandledErrorInStreamPipeline/rxjsStreams.js

@@ -0,0 +1,20 @@
+import * as rx from 'rxjs';
+import * as ops from 'rxjs/operators';
+import { TestScheduler } from 'rxjs/testing';
+import { pluck } from "rxjs/operators/pluck";
+
+const { of, from } = rx;
+const { map, filter } = ops;
+
+function f(){
+  of(1, 2, 3).pipe(map(x => x * 2));
+  someNonStream().pipe(map(x => x * 2));
+
+  let testScheduler = new TestScheduler();
+  testScheduler.run(({x, y, z}) => {
+    const source = x('', {o: [a, b, c]});
+    z(source.pipe(null)).toBe(expected,y,);
+  });
+
+  z.option$.pipe(pluck("x"))
+}