Changed MFPRequest.sendData() to public
Changed MFPRequest.sendData() to public

- Not sure why this was not public before, as it was intended to be part of the API

ibm-bluemix-mobile-services/bms-clientsdk-swift-core,ibm-bluemix-mobile-services/bms-clientsdk-swift-core,ibm-bluemix-mobile-services/bms-clientsdk-swift-core