jberet-sql.properties is sometimes loaded twice by JdbcRepository class

In JdbcRepository, jberet-sql.properties is loaded twice:

org.jberet.repository.JdbcRepository#JdbcRepository(javax.sql.DataSource, java.util.Properties)
org.jberet.repository.JdbcRepository#createTables

At runtime, when a JdbcRepository is created with DataSource, this resource is loaded twice, with the 2nd one overwriting the content from the 1st one.