Fix deprecation: Doctrine safepoints

Prior to this change, deprecation warnings about safepoints were thrown.

This change enables safepoints for all connections. Safepoints are not supported by myisam tables or drivers like sqlite.

doctrine/dbal#6272

Author: johanib

config/packages/doctrine.yaml

@@ -12,6 +12,7 @@ doctrine:
                 password: "%database_middleware_password%"
                 server_version: "%database_server_version%"
                 charset: utf8
+                use_savepoints: true
             gateway:
                 driver:   "%database_driver%"
                 host:     "%database_host%"
@@ -21,6 +22,7 @@ doctrine:
                 password: "%database_gateway_password%"
                 server_version: "%database_server_version%"
                 charset: utf8
+                use_savepoints: true
             deploy:
                 driver:   "%database_driver%"
                 host:     "%database_host%"
@@ -30,6 +32,7 @@ doctrine:
                 password: "%database_deploy_password%"
                 server_version: "%database_server_version%"
                 charset: utf8
+                use_savepoints: true
         types:
             authority_role:
                 class: Surfnet\StepupMiddleware\ApiBundle\Doctrine\Type\AuthorityRoleType