[webapi]Change ref test in tct-canvas-html5-tests

Impacted tests(approved):new 0,update 5,delete 0
Unit test platform:[Android]
Unit test result summary:pass 0,fail 5,block 0
Merge pull request #939 from chenxix/chenxi/misc-uiautomation/update-canvas

[webapi]Change ref test in tct-canvas-html5-tests