Bug #1003636 modify system manifest.webapp for validationtools-request

[bug number  ] 1003636
[root cause  ] modify system manifest.webapp
[changes     ]
[side effects]
[self test   ] pass
[reviewers   ]
Merge pull request #18910 from leonazhao/bug1003636v1.3t

Bug1003636 modify system manifest.webapp for validationtools-request