default log aggregator username and password to an empty string
default log aggregator username and password to an empty string

other configuration options seem to follow this pattern; the UI code
seems to expect that it can send across an empty string

see: #5276

snahelou/awx,snahelou/awx,wwitzel3/awx,snahelou/awx,wwitzel3/awx,snahelou/awx,wwitzel3/awx,wwitzel3/awx