NEW: Run the test suite against Solr version 4.9.0 on Travis.
NEW: Run the test suite against Solr version 4.9.0 on Travis.

yanxi-com/solr-node-client,lbdremy/solr-node-client,nicolasembleton/solr-node-client,lbdremy/solr-node-client,Bangsheng/solr-node-client,CondeNast/solr-node-client,luketaverne/solr-node-client,kfitzgerald/solr-node-client,godong9/solr-node-client