removed unneeded import statements, added setIgnoreIncomingNotifications
removed unneeded import statements, added setIgnoreIncomingNotifications

ibm-bluemix-mobile-services/bms-clientsdk-cordova-plugin-push,ibm-bluemix-mobile-services/bms-clientsdk-cordova-plugin-push,ibm-bluemix-mobile-services/bms-clientsdk-cordova-plugin-push