#60 Support for validation of ejb dtds added

[Scott M Stark]

Support for the validation of ejb-jar.dtd, and
jboss.dtd conforming deployment descriptors has
been added to the XmlFileReader. It is disabled by
default. To enable the printing of dtd errors set
the ValidateDTDs attribute of the ContainerFactory
service mbean to true in the jboss.jcml file:

<mbean code="org.jboss.ejb.ContainerFactory"
name=":service=ContainerFactory">
<attribute
name="VerifyDeployments">true</attribute>
<attribute name="ValidateDTDs">true</attribute>
<attribute name="MetricsEnabled">false</attribute>
<attribute name="VerifierVerbose">true</attribute>
<attribute
name="BeanCacheJMSMonitoringEnabled">false</attribute>
</mbean>