Upgraded elasticsearch to 1.7.3
Upgraded elasticsearch to 1.7.3

santanusinha/foxtrot,dangi-mukesh/foxtrot,vivekkothari/foxtrot,vivekkothari/foxtrot,Flipkart/foxtrot,dangi-mukesh/foxtrot,Flipkart/foxtrot,vivekkothari/foxtrot,dangi-mukesh/foxtrot,santanusinha/foxtrot,Flipkart/foxtrot,santanusinha/foxtrot,Flipkart/foxtrot,vivekkothari/foxtrot,santanusinha/foxtrot,Flipkart/foxtrot,dangi-mukesh/foxtrot,santanusinha/foxtrot,vivekkothari/foxtrot,dangi-mukesh/foxtrot