5935 - Tests should use a mix of IPv4 and IPv6
5935 - Tests should use a mix of IPv4 and IPv6

updated fakeBridge(), fakeBridge6() to randomly set the address
class in or_addresses so that test coverage is more complete.

mmaker/bridgedb,pagea/bridgedb,wfn/bridgedb,wfn/bridgedb,mmaker/bridgedb,pagea/bridgedb,sysrqb/bridgedb