[SO] Use readiness chart

Some SO components are using readiness check init container. In "gating"
mode, so image and readiness image are not coming from the same
repository.
By using readinessCheck charts, we can control that.

Issue-ID: OOM-2617
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I44a4e9daf72d1a42d3d84b6d56b588cd7d44fb08
diff --git a/kubernetes/so/components/so-openstack-adapter/values.yaml b/kubernetes/so/components/so-openstack-adapter/values.yaml
index 41ccb95..64321f4 100755
--- a/kubernetes/so/components/so-openstack-adapter/values.yaml
+++ b/kubernetes/so/components/so-openstack-adapter/values.yaml
@@ -33,6 +33,10 @@
     serviceName: mariadb-galera
     servicePort: '3306'
 
+readinessCheck:
+  wait_for:
+    - so-mariadb-config
+
 #################################################################
 # Secrets metaconfig
 #################################################################