HI Friend,
Couple of questions,
Which method you are using for the master discovery ? DHCP or DNS or static
do you have Master-Local setup ? if not. we need not worry about LMS, changing the LMS IP will not help here.
if you look at the AP boot sequence, first AP will discover the master and update the Image and downlods the provisioned AP-group then it will terminate on the LMS.
To achieve this you need not change the switch IP ( Controller-IP vlan <>) let it be as loopback IP.
The idle solution should be ,
1. Move all your AP to VLAN 115
2. Change the master-redundancy VLAN to VLAN 115
3. Change the master IP of your APs to the Virtual IP of VRRP running on VLAN 115.
Hope got some more clarity,
Please feel free for any further clarity on this.