[sre-ci]Add galera_mysql parametr for mysql 5.7

Related-Prod: PROD-36707
Change-Id: I2bf38f1d354d0895133a23b89bb14d47dd8a65d1
diff --git a/tcp_tests/templates/heat-cicd-queens-dvr-sl/salt-context-cookiecutter.yaml b/tcp_tests/templates/heat-cicd-queens-dvr-sl/salt-context-cookiecutter.yaml
index 74f38a1..86344d9 100644
--- a/tcp_tests/templates/heat-cicd-queens-dvr-sl/salt-context-cookiecutter.yaml
+++ b/tcp_tests/templates/heat-cicd-queens-dvr-sl/salt-context-cookiecutter.yaml
@@ -293,6 +293,7 @@
   stacklight_long_term_storage_type: prometheus
   nova_vnc_tls_enabled: 'True'
   galera_ssl_enabled: 'True'
+  galera_mysql_version: 5.7
   openstack_mysql_x509_enabled: 'True'
   rabbitmq_ssl_enabled: 'True'
   openstack_rabbitmq_x509_enabled: 'True'