treat IndexAlreadyExistsException more robustly
treat IndexAlreadyExistsException more robustly

it seems that since ES 0.90.6 the error is:
"IndexAlreadyExistsException[[graphite_metrics] already exists]"
whereas it used to be:
"IndexAlreadyExistsException[[graphite_metrics] Already exists]"

now we just check for "IndexAlreadyExistsException" which should
suffice

dbirchak/graph-explorer,dbirchak/graph-explorer,vimeo/graph-explorer,dbirchak/graph-explorer,vimeo/graph-explorer,vimeo/graph-explorer,dbirchak/graph-explorer,vimeo/graph-explorer