Test proxysql with no TLS

Author: seunghun1ee

etc/kayobe/environments/ci-multinode/kolla/globals.yml

@@ -15,6 +15,10 @@ kolla_enable_tls_backend: "yes"
 # Enable RabbitMQ TLS
 rabbitmq_enable_tls: "yes"
 
+# Disable database TLS
+database_enable_tls_internal: false
+database_enable_tls_backend: false
+
 ############################################################################
 # Most development environments will use nested virtualisation, and we can't
 # guarantee that nested KVM support is available. Use QEMU as a lowest common