Changed the default `pid_path` attribute to "/usr/local/var/run"
Changed the default `pid_path` attribute to "/usr/local/var/run"

On some system, contents of `/var/run` (and possibly `/usr/local/var/run`) is cleared on restart;
http://askubuntu.com/questions/89352/does-ubuntu-periodically-clean-empty-directories-under-var-run.

As discussed in #115 and #108, the solution is to simply ditch the `elasticsearch` prefix,
the PID files are based on node name anyway.

Closes cookbook-elasticsearch#108
Closes cookbook-elasticsearch#115

gouketsu/cookbook-elasticsearch,gouketsu/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,vacay/vcy-elasticsearch,GemHQ/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,michaeld/elasticsearch-cookbook,spuder/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,gilt/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,spuder/cookbook-elasticsearch,gilt/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,vacay/vcy-elasticsearch,gilt/cookbook-elasticsearch,paulczar/cookbook-elasticsearch,gouketsu/cookbook-elasticsearch,spuder/cookbook-elasticsearch,vacay/vcy-elasticsearch