pglookout: Accept that sometimes the slave node pglookout doesn't know replication lag
pglookout: Accept that sometimes the slave node pglookout doesn't know replication lag

This comes when for example the pg on the pglookout's node is crashing.
Also write the state file on disk even if cluster state check fails.

saaros/pglookout,Ormod/pglookout,Ormod/pglookout,ohmu/pglookout