Changed `pod spec lint` to `pod lib lint` in Travis build
Changed `pod spec lint` to `pod lib lint` in Travis build

ibm-bluemix-mobile-services/bms-clientsdk-swift-analytics-api,ibm-bluemix-mobile-services/bms-clientsdk-swift-analytics-api,ibm-bluemix-mobile-services/bms-clientsdk-swift-analytics-api