add ipv6 support to oo-register-dns

thanks to Magnus919bis on irc for the idea
add acct id to analytics export
haproxy cartridge's max limit should be set to -1 when making the app ha
Merge pull request #4070 from rajatchopra/master

Merged by openshift-bot
Merge pull request #3402 from mscherer/feature/broker/ipv6

Merged by openshift-bot