removed multi catch for 1.6 support
removed multi catch for 1.6 support

arnesson/cordova-plugin-firebase,arnesson/cordova-plugin-firebase,DigitalsunrayMedia/cordova-plugin-firebase,arnesson/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,DigitalsunrayMedia/cordova-plugin-firebase,arnesson/cordova-plugin-firebase,DigitalsunrayMedia/cordova-plugin-firebase