[webapi]Change ref test in tct-multicolumn-css3-tests

Impacted tests(approved):new 0,update 4,delete 0
Unit test platform:[Android]
Unit test result summary:pass 0,fail 4,block 0
Merge pull request #963 from chenxix/chenxi/misc-uiautomation/update-multicolumn-second

[webapi]Change ref test in tct-multicolumn-css3-tests