this changes unbound to listen to 127.0.0.150 (150 is roman CL)
we cannot only bind on docker bridge because unbound is relied
upon for the initial domain setup. docker itself is only initialized
when the platform initializes
this adds and waits for AAAA records based on setting. we have to wait
for both A and AAAA because we don't know if the user is accessing via
IPv4 or IPv6. For Let's Encrypt, IPv6 is preferred (but not sure if it
retries if IPv6 is unreachable).
part of #264
the DNS backends require many different params, it's just easier to
pass them all together and have backends do whatever.
For example, route53 API requires the fqdn. Some other backends require just the
"part" to insert.
* location - location in the database (where app is installed)
* zoneName - the dns zone name
* domain - domain in the database (where apps are installed into)
* name/getName() - this returns the name to insert in the DNS based on zoneName/location
* fqdn - the fully resolved location in zoneName
verifyDnsConfig also takes a domain object even if it's not in db just so that we can
test even existing domain objects, if required. The IP param is removed since it's not
required.
for caas, we also don't need the fqdn hack in dnsConfig anymore
Girish Ramakrishnan