[PROD-30162] Change Keycloak Haproxy backend port

Change Keycloack Haproxy backend port to 8086 since it
conflicts with Gerrit Haproxy backend

Change-Id: I52e1815cfc9da176b76ef3223e7154e0b2577b8e
(cherry picked from commit f9be02627e501058ef8b13a7b955df3cf10e46f5)
1 file changed