[KFSQA-1039] Need to check if dv contactphone# is 'null'.  It will cause phonenumberformat error
Commented out KFSBasePage#expected_element

In the long run, we should be able to uncomment the line because anytime we try to go to a KFSBasePage this element should exist. Unfortunately, we can't for now because if you use on(KFSBasePage), execution will hang until the expected_element materializes (or it'll error out). That's to be expected, but we have some checks that try to use on(KFSBasePage) to determine whether we are actually *on* a given page (see AssetManualPaymentObject#build). In the case that we aren't, these checks don't work as intended.
Fixed the method for locating the header line on ItemsTab. Previously, it was misconfigured for REQs that did not come from e-SHOP.
[KFSQA-1054] merged from master