CB-6961 port file-transfer tests to framework

fixed page style, cleaned up logging
Fixed failing spec.19 on wp8

Also removed duplicate test
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-plugin-file-transfer into cdvtest
Renamed test dir, added nested plugin.xml and test

Added upload spec.6
Merge branch 'cdvtest' of https://github.com/stacic/cordova-plugin-file-transfer