Fixed CreateSendBase.make_request and CreateSendBase._post to increase coverage as much as possible.
Fixed CreateSendBase.make_request and CreateSendBase._post to increase coverage as much as possible.

stored/createsend-python,campaignmonitor/createsend-python,stored/createsend-python,guilhermetavares/createsend-python,guilhermetavares/createsend-python,campaignmonitor/createsend-python