1.change Order to Check Out in shoppingCart.view.xml
2.add 'CHECKOUT=Check Out' in i18n_en_US and i18n_zh_CN

Change-Id: Ia67e287e58c9605e98dcb07f08dae70dfd9e33d4
Signed-off-by: I311207 <I311207@PVGN50854049A.apj.global.corp.sap>