Made BMSClient intializer properties optional - bluemixAppRoute and bluemixAppGUID are not required for BMSAnalytics
Made BMSClient intializer properties optional
- bluemixAppRoute and bluemixAppGUID are not required for BMSAnalytics

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