adding missing initializer impl
adding missing initializer impl

apigee/apigee-ios-sdk,developerdave/apigee-ios-sdk,apigee/apigee-ios-sdk,apigee/apigee-ios-sdk,developerdave/apigee-ios-sdk,developerdave/apigee-ios-sdk,developerdave/apigee-ios-sdk,apigee/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,developerdave/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,developerdave/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,apigee/apigee-ios-sdk,apigee/apigee-ios-sdk