[grouper-shib] attributes from the attribute framework must be explicitly configured

To improve performance, attributes from the attribute framework must be explicitly configured in the attribute resolver configuration (ldappc-resolver.xml).

Previously, all attributes from the attribute framework were returned :

<resolver:DataConnector id="testAttributesOnly" xsi:type="grouper:GroupDataConnector" />

But now, attribute framework attributes must be explicitly configured :

<resolver:DataConnector id="testAttributesAndAttributeDefs" xsi:type="grouper:GroupDataConnector">
<grouper:Attribute id="parentStem:mailAlternateAddress" />
</resolver:DataConnector>