TT#154255 install both redis flavors

so switch between both is easier

Change-Id: Ifda0c344c6923b002701e503d93ef2e358100f28

debian/control

@@ -374,7 +374,8 @@ Depends:
  prometheus-node-exporter,
  prometheus-process-exporter,
  prometheus-redis-exporter,
- redis-server | keydb-server,
+ redis-server,
+ keydb-server,
  rsyslog,
  slapd,
  snmpd,
@@ -472,7 +473,8 @@ Depends:
  prometheus-node-exporter,
  prometheus-process-exporter,
  prometheus-redis-exporter,
- redis-server | keydb-server,
+ redis-server,
+ keydb-server,
  rsyslog,
  ssh,
  systemd,