Metacat

Use the SolrQueryServiceController to get the spec version and index schema information.

Change the package of SolrQueryReponseWriterFactory and SolrQueryResponseTransformer.

Use the new query(SolrParams param) method of the SolrQueryServiceController.

Use the SolrQueryServiceController class to handle the query.

Move the cod which transformed the query response to the inputstream to the metacat-common module.
Remove some obsoleted imports.

Move the code to generate the QueryResponseWriter to the metacat-common module. So it can be shared with the metacat-index module.

organize imports

remove extra lines from returned <docid/> block. https://projects.ecoinformatics.org/ecoinfo/issues/5932

Allow use of PID instead of docid in the Perl registry. At least for reading/editing and deleting existing content. Does not create content using a pid. https://projects.ecoinformatics.org/ecoinfo/issues/5932

initialize the SOLR home directory if it does not already exist.