[master][wrt][XWALK-3070] Add 2 new TCs

Impacted TCs num(approved):New 2,Update 0,Delete 0
Test Result: pass 2, fail 0, block 0
Merge pull request #1557 from linshen/yhc-update-backendCheck-1

[master][wrt][XWALK-3070] Add 2 new TCs