SOLR-95: refactored how Solr starts for tests. A few additional changes: added conf directory under test to allow the Solr test server to have its own configuration and data directory and set solr.solr.home when launching Solr.
incubator/solr/trunk/client/ruby/solrb/Rakefile
incubator/solr/trunk/client/ruby/solrb/test/conf/