Add block pools

[sebastianelsner]

We needed to be able to set / override pools on block level.

Summary

• add block-level pools map support in BlockData (JSON, wire serialization, info/weight output)
• apply block pools as override of job pools during run eligibility and pool-priority scoring
• document af.Block.setPools(dict) in block documentation

We have been running this in production for about a month now.

[timurhai]

Hello, Sebastian! Thank you for developing!

Since you changed BlockData::v_readwrite by adding rw_IntMap(m_pools, msg);,
it becomes a new version, which is not compatible with any previous.

This number should be also incremented:
https://github.com/CGRU/cgru/blob/master/afanasy/src/include/afversion.h
This makes other version clients to exit.

And it also a new 3.5.0 version.

I'll be back to this issue some later.
I have no plans to change files from this commit in the near feature.

[sebastianelsner]

I bumped the versions but no rush

[lithorus]

With the recent RapidJSON changes, it might be a good idea to hold off a bit on this merge so it's easier to roll back from any potential issues.

[sebastianelsner]

@lithorus did you face any issues with the new rapidjson? we did not.

[lithorus]

@sebastianelsner nope. Seems to be working fine.

[timurhai]

Hello! New rapidjson working fine for us too.
Soon i will create 3.4.1 release:
https://cgru.readthedocs.io/en/latest/changes_log/changes_log.html#v3-4-1

Later, i will merge this PR.
Also i want to change the way that server send logs. Now it is a simple string array.
It will be better to send a structure for each record like this:
https://cgru.readthedocs.io/en/latest/afanasy/server.html#database-schema

And it will break binary network compatibility too.
And may be we should add this to binary answer too: #634