connection properties are being improperly quoted

I placed two connection property elements into my standalone.xml configuration for my data source, which is MySQL (5.5.9).

When every I first try to execute anything I get the following error:

17:31:42,646 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/Order].[CreateData]] (http-192.168.1.22%2F192.168.1.22-8080-1) Servlet.service() for servlet CreateData threw exception: java.sql.SQLException: The connection property 'rewriteBatchedStatements' only accepts values of the form: 'true', 'false', 'yes' or 'no'. The value '("rewriteBatchedStatements" => "true")' is not in this set.

The entry in standalone.xml is as follows:

<connection-property name="rewriteBatchedStatements">true</connection-property>

As you can see it is the correct value that is enumerated in the error message from MySQL, but it complains that "true" is not valid. It appears the code is adding the double quotes around the value, instead of leaving it unquoted.