Comment 4 for bug 1498605

A deployment done with that branch worked, mysql/0 (the leader) has the correct netmask for the secondary IP, and it's also listed as a secondary now:

$ juju ssh mysql/0
Warning: Permanently added '10.96.10.114' (ECDSA) to the list of known hosts.
Warning: Permanently added '10.96.9.16' (ECDSA) to the list of known hosts.
Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-63-generic x86_64)

 * Documentation: https://help.ubuntu.com/

 System information disabled due to load higher than 4.0

  Get cloud support with Ubuntu Advantage Cloud Guest:
    http://www.ubuntu.com/business/services/cloud

ubuntu@juju-machine-0-lxc-5:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
25: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:16:3e:a6:8d:6b brd ff:ff:ff:ff:ff:ff
    inet 10.96.9.16/16 brd 10.96.255.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 10.96.10.109/16 brd 10.96.255.255 scope global secondary eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::216:3eff:fea6:8d6b/64 scope link
       valid_lft forever preferred_lft forever

$ juju status mysql --format=tabular
[Services]
NAME STATUS EXPOSED CHARM
hacluster-mysql false cs:trusty/hacluster-23
landscape-client false cs:trusty/landscape-client-12
mysql unknown false cs:~ahasenack/trusty/percona-cluster-autodetect-vip-0

[Units]
ID WORKLOAD-STATE AGENT-STATE VERSION MACHINE PORTS PUBLIC-ADDRESS MESSAGE
mysql/0 unknown idle 1.24.5 0/lxc/5 10.96.9.16
  hacluster-mysql/0 unknown idle 1.24.5 10.96.9.16
  landscape-client/30 unknown idle 1.24.5 10.96.9.16
mysql/1 unknown idle 1.24.5 2/lxc/5 10.96.8.230
  hacluster-mysql/1 unknown idle 1.24.5 10.96.8.230
  landscape-client/32 unknown idle 1.24.5 10.96.8.230
mysql/2 unknown idle 1.24.5 4/lxc/5 10.96.9.11
  hacluster-mysql/2 unknown idle 1.24.5 10.96.9.11
  landscape-client/36 unknown idle 1.24.5 10.96.9.11

[Machines]
ID STATE VERSION DNS INS-ID SERIES HARDWARE
0 started 1.24.5 squier.scapestack /MAAS/api/1.0/nodes/node-60c21846-546c-11e4-821d-2c59e54ace74/ trusty arch=amd64 cpu-cores=4 mem=16384M
2 started 1.24.5 hendel.scapestack /MAAS/api/1.0/nodes/node-f7bd8a1c-39ec-11e5-ab72-2c59e54ace74/ trusty arch=amd64 cpu-cores=4 mem=16384M
4 started 1.24.5 sekine.scapestack /MAAS/api/1.0/nodes/node-179adc6a-39eb-11e5-ab5d-2c59e54ace74/ trusty arch=amd64 cpu-cores=4 mem=16384M