storage_proxy::coordinator_query_result: merge constructors into one w/ default params
storage_proxy::coordinator_query_result: merge constructors into one w/ default params

scylladb/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla