filetransfer.spec.6 was failing in 4.x branch of iOS because -1 was returned.
filetransfer.spec.6 was failing in 4.x branch of iOS because -1 was returned.

nixplay/cordova-plugin-file-transfer,starquake/cordova-plugin-file-transfer,mmig/cordova-plugin-file-transfer,mmig/cordova-plugin-file-transfer,starquake/cordova-plugin-file-transfer,purplecabbage/cordova-plugin-file-transfer,starquake/cordova-plugin-file-transfer,GenusAS/cordova-plugin-file-transfer,starquake/cordova-plugin-file-transfer,GenusAS/cordova-plugin-file-transfer,mmig/cordova-plugin-file-transfer,nixplay/cordova-plugin-file-transfer,alsorokin/cordova-plugin-file-transfer,apache/cordova-plugin-file-transfer,mmig/cordova-plugin-file-transfer,nixplay/cordova-plugin-file-transfer,apache/cordova-plugin-file-transfer,nixplay/cordova-plugin-file-transfer,alsorokin/cordova-plugin-file-transfer,alsorokin/cordova-plugin-file-transfer,purplecabbage/cordova-plugin-file-transfer,purplecabbage/cordova-plugin-file-transfer,bcalvez/cordova-plugin-file-transfer,GenusAS/cordova-plugin-file-transfer,bcalvez/cordova-plugin-file-transfer,alsorokin/cordova-plugin-file-transfer,purplecabbage/cordova-plugin-file-transfer,GenusAS/cordova-plugin-file-transfer