[webapi] restore 4 reference cases to manual type

Impacted tests(approved):new 0,update 4,delete 0
Unit test platform:[Android]
Unit test result summary:pass 4,fail 0,block 0
There are two '<p>' element on the origin test case page. And the second one is invisible, but it exists.  If remove this line, the image comparison tool will think these two pages are different.