INDY-1681: Backup replica removal on primary loss
INDY-1681: Backup replica removal on primary loss

- Fixed a PEP 8 warning.

Signed-off-by: Nikita Spivachuk <3e3e21836abf30022a073335b019dff10b1bbc86@dsr-company.com>

evernym/zeno,evernym/plenum