Harmonize the use of [ios|osx]-CFBundle[Identifier|version]

There seems to be a mismatch with the use of ios_CFBundleIdentifier and osx_CFBundleIndentifier:

• https://github.com/apache/cordova-osx/blob/cbfa7a531bb2a0a0e39fda14edaaff0e4a146b63/bin/templates/scripts/cordova/lib/prepare.js#L131
• https://github.com/apache/cordova-lib/blob/master/cordova-lib/src/cordova/metadata/osx_parser.js#L71