Added more unit tests with delivery of will message with all QoS levels (0,1 and 2)
Added more unit tests with delivery of will message with all QoS levels (0,1 and 2)

jenmalloy/enmasse,EnMasseProject/enmasse,jenmalloy/enmasse,EnMasseProject/enmasse,EnMasseProject/enmasse,jenmalloy/enmasse,EnMasseProject/enmasse,jenmalloy/enmasse,EnMasseProject/enmasse,EnMasseProject/enmasse,jenmalloy/enmasse,jenmalloy/enmasse,EnMasseProject/enmasse,jenmalloy/enmasse