Steps to Reproduce:
1. Install pool of 4 nodes.
2. Force view change by primary disconnecting (2nd node).
3. Write and read NYM.
4. Connect node back.
5. Force view change by primary demoting (3rd node).
6. Write and read NYM.
Pool has lost write consensus in Step 5. Step 6 NYM is not written.
Pool should have write\read consensus at n=3 f=0.
Pool reaches consensus after all nodes' restart.
- relates to
INDY-1583 Pool stopped writing after F change