check for no hosts on getaddrinfo
check for no hosts on getaddrinfo

not sure how this can happen without raising something else, but
socket.create_connection checks it

mambocab/python-driver,kishkaru/python-driver,thobbs/python-driver,vipjml/python-driver,mambocab/python-driver,kishkaru/python-driver,coldeasy/python-driver,stef1927/python-driver,datastax/python-driver,vipjml/python-driver,thelastpickle/python-driver,stef1927/python-driver,datastax/python-driver,thobbs/python-driver,markflorisson/python-driver,coldeasy/python-driver,markflorisson/python-driver,thelastpickle/python-driver