Stop failovers if the count of simultaneously failed
amphora reaches the number configured in the new
failover_threshold option.
This may prevent large scale accidental failover events,
like in the case of network failures or read-only
database issues.
Story: 2005604
Task: 30837
Co-Authored-By: Tatsuma Matsuki <matsuki.tatsuma@jp.fujitsu.com>
Co-Authored-By: Tom Weininger <tweining@redhat.com>
Change-Id: I0d2c332fa72e47e70d594579ab819a6ece094cdd