Summary:
`SHOW STORAGE STATS` when executed in a Raft cluster should return
stats for each member of the cluster.
`StorageStats` starts a RPC server on each member of the cluster that answers
about its local storage stats.
The query can be invoked only on the current leader, the leader sends a request
to each peer and shows the results it gets. If some peers don't answer within 1
second, stats for those peers won't be shown.
The new output can be seen here: P27
Reviewers: ipaljak, mferencevic
Reviewed By: ipaljak
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D1907
1de34d8b92