[#1909] Enable opened/closed connections logging

 For testing

Author: DavideD

hibernate-reactive-core/src/test/resources/log4j2.properties

@@ -10,6 +10,10 @@ logger.hibernate-dialect.level = debug
 logger.hibernate.name = org.hibernate.SQL
 logger.hibernate.level = info
 
+# We want to log when a connection is opened/closed
+logger.sql-connection.name = org.hibernate.reactive.pool.impl
+logger.sql-connection.level = trace
+
 # Setting level to TRACE will show parameters values
 logger.sql-parameters-values.name = org.hibernate.type
 logger.sql-parameters-values.level = info