Kiln match introspection for local-solr-add-indices

<map:match id="local-solr-add-indices" pattern="add/indices/*.xml">
<map:aggregate element="insert">
<map:part src="../content/xml/indices/{1}.xml" />
</map:aggregate>
<map:transform src="../stylesheets/solr/index-file-to-xincludes.xsl">
<map:parameter name="subdirectory" value="{1}" />
</map:transform>
<map:transform type="xinclude" />
<map:serialize type="xml" />
</map:match>