[CB-2213] Added a test for FileTransfer.upload.
[CB-2213] Added a test for FileTransfer.upload.

apache/cordova-mobile-spec,apache/cordova-mobile-spec,apache/cordova-mobile-spec,apache/cordova-mobile-spec,corimf/cordova-mobile-spec,ollie314/cordova-mobile-spec,corimf/cordova-mobile-spec,ollie314/cordova-mobile-spec,lorinbeer/cordova-mobile-spec,ollie314/cordova-mobile-spec,corimf/cordova-mobile-spec,corimf/cordova-mobile-spec,ollie314/cordova-mobile-spec,polyvi/xface-mobile-spec,apache/cordova-mobile-spec,polyvi/xface-mobile-spec,corimf/cordova-mobile-spec,polyvi/xface-mobile-spec,ollie314/cordova-mobile-spec