Move files in testkit/web to webrunner

Signed-off-by: Hao yunfeix <yunfeix.hao@intel.com>
[wrt] Update the url in single page since the old one is invalid
Merge pull request #218 from yxu66x/wrt/android/certificate

[wrt] Update the url in single page since the old one is invalid
[webapi] Add back 4 tests for HTMLElement dataset attribute
[webapi] Fix typo of 2 tests for Geolocation