Summary:
This makes the concrete memory resource an explicit argument in custom
procedures. Unfortunately, the API is a bit uglier but at least we don't
have to worry about threading, global state or similar. This is the
primary reason for this change as we would probably like to allow
procedures to spawn threads to compute stuff in a parallel fashion.
Reviewers: mferencevic, dsantl
Reviewed By: mferencevic
Subscribers: pullbot
Differential Revision: https://phabricator.memgraph.io/D2495
2e1063bbdb