thrift: fix collectd type name
thrift: fix collectd type name

collectd rejects "thrift_requests" because it doesn't exist in its types.db.
Replace with "total_requests".

stamhe/scylla,capturePointer/scylla,linearregression/scylla,stamhe/scylla,shaunstanislaus/scylla,glommer/scylla,aruanruan/scylla,shaunstanislaus/scylla,kangkot/scylla,duarten/scylla,asias/scylla,senseb/scylla,avikivity/scylla,victorbriz/scylla,phonkee/scylla,victorbriz/scylla,rluta/scylla,guiquanz/scylla,capturePointer/scylla,bowlofstew/scylla,respu/scylla,wildinto/scylla,bowlofstew/scylla,raphaelsc/scylla,avikivity/scylla,justintung/scylla,glommer/scylla,justintung/scylla,asias/scylla,raphaelsc/scylla,asias/scylla,tempbottle/scylla,senseb/scylla,gwicke/scylla,linearregression/scylla,gwicke/scylla,guiquanz/scylla,dwdm/scylla,capturePointer/scylla,justintung/scylla,acbellini/scylla,phonkee/scylla,phonkee/scylla,duarten/scylla,eklitzke/scylla,shaunstanislaus/scylla,kangkot/scylla,respu/scylla,respu/scylla,scylladb/scylla,victorbriz/scylla,kjniemi/scylla,scylladb/scylla,rluta/scylla,wildinto/scylla,dwdm/scylla,raphaelsc/scylla,aruanruan/scylla,kjniemi/scylla,acbellini/scylla,bowlofstew/scylla,rentongzhang/scylla,tempbottle/scylla,senseb/scylla,rentongzhang/scylla,eklitzke/scylla,eklitzke/scylla,scylladb/scylla,dwdm/scylla,aruanruan/scylla,guiquanz/scylla,duarten/scylla,avikivity/scylla,wildinto/scylla,linearregression/scylla,stamhe/scylla,glommer/scylla,rentongzhang/scylla,acbellini/scylla,kangkot/scylla,rluta/scylla,tempbottle/scylla,scylladb/scylla,gwicke/scylla,kjniemi/scylla