Change the default solr endpoint to be the localhost.
Read the solr configuration file name and collection name from the property file.
simplify testing with embedded solr server locations -- no need to copy solr-home or set system properties. Still more to do (factory method) but this is getting cleaner.
include test resource bundles to be loaded into Settings configuration during testing.
Add documents for updating solr index.
Add junit test class to test the SolrIndex class.