Add redis metadata for gnocchi

Add coordination_backend:redis metadata structure
Add storage:redis metadata structure
Add storage:incomming:redis metadata structure

Set softparams in defaults/openstack/init.yml:

openstack_telemetry_redis_db = 0
openstack_telemetry_redis_sentinel_mastername = 'master_1'

Change-Id: I22f5f849b71a7d7a424dd43472ab6167837b496a
Related-Prod: PROD-29126
(cherry picked from commit fab80dbb2afe6c50140acc6e43468ed05dc672a0)
diff --git a/defaults/openstack/init.yml b/defaults/openstack/init.yml
index 4b1960d..b2a68d6 100644
--- a/defaults/openstack/init.yml
+++ b/defaults/openstack/init.yml
@@ -15,6 +15,8 @@
     openstack_telemetry_service_host: ${_param:openstack_telemetry_service_hostname}.${linux:system:domain}
     openstack_service_user_enabled: True
     openstack_upgrade_enabled: False
+    openstack_telemetry_redis_db: '0'
+    openstack_telemetry_redis_sentinel_mastername: 'master_1'
     # SSL
     ceilometer_agent_ssl_enabled: False
     openstack_mysql_x509_enabled: False
@@ -82,6 +84,8 @@
     gnocchi_version: 4.0
     gnocchi_old_version: ${_param:gnocchi_version}
     gnocchi_upgrade_enabled: ${_param:openstack_upgrade_enabled}
+    gnocchi_redis_db: ${_param:openstack_telemetry_redis_db}
+    gnocchi_redis_sentinel_mastername: ${_param:openstack_telemetry_redis_sentinel_mastername}
     # Panko
     panko_memcache_security_enabled: ${_param:openstack_memcache_security_enabled}
     panko_memcache_secret_key: ''