cleanup(change_detection): moved pipes-related tests to the pipes dir

Author: vsavkin

modules/angular2/test/change_detection/iterable_changes_spec.js renamed to modules/angular2/test/change_detection/pipes/iterable_changes_spec.js

@@ -4,8 +4,8 @@ import {IterableChanges} from 'angular2/src/change_detection/pipes/iterable_chan
 import {NumberWrapper} from 'angular2/src/facade/lang';
 import {ListWrapper, MapWrapper} from 'angular2/src/facade/collection';
 
-import {TestIterable} from './iterable';
-import {iterableChangesAsString} from './util';
+import {TestIterable} from '../iterable';
+import {iterableChangesAsString} from '../util';
 
 // todo(vicb): UnmodifiableListView / frozen object when implemented
 export function main() {

modules/angular2/test/change_detection/keyvalue_changes_spec.js renamed to modules/angular2/test/change_detection/pipes/keyvalue_changes_spec.js

@@ -2,7 +2,7 @@ import {describe, it, iit, xit, expect, beforeEach, afterEach} from 'angular2/te
 import {KeyValueChanges} from 'angular2/src/change_detection/pipes/keyvalue_changes';
 import {NumberWrapper, isJsObject} from 'angular2/src/facade/lang';
 import {MapWrapper} from 'angular2/src/facade/collection';
-import {kvChangesAsString} from './util';
+import {kvChangesAsString} from '../util';
 
 // todo(vicb): Update the code & tests for object equality
 export function main() {