update BLOCK_CHAIN_SIZE and CHAIN_STATE_SIZE

Summary:
Update parameters before next release.
On my machine the sizes are 146 GB and 2.7 GB,
so update the parameters to 150 and 3.

Test Plan: make check

Reviewers: deadalnix, schancel, sickpig, #bitcoin_abc

Reviewed By: deadalnix, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D587