Gracefully handle network bridge without IP association at startup

Addresses #8444

Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)
what sucks is if we fail after this to recreate the bridge will all the other test be screwed... I would rather have that I think than no test at all but idk