Database*LoginModules should use the transactionManagerJndiName module option

The DatabaseCertLoginModule and DatabaseServerLoginModule use for role search a routine from a class org.jboss.security.auth.spi.DbUtil. But there is a hardcoded reference to JNDI name for Transaction Manager lookup "java:/TransactionManager" - which is not valid in the EAP 6. The JNDI name should be provided as a parameter.

The login module option "transactionManagerJndiName" is already implemented in the DatabaseServerLoginModule, but it should be also added to the DatabaseCertLoginModule.