Ensure pgbouncer doesn't fail reconfigure if database isn't ready yet

If the database isn't ready, then pgb-notify will error.

/cc @ckatanda

assigned to @ibaum

changed milestone to %10.0

created branch 2796-ensure-consul-runs-before-pgbouncer

mentioned in merge request !1969

changed title from Ensure consul runs before pgbouncer to Ensure pgbouncer doesn't fail reconfigure if database isn't ready yet

changed the description

mentioned in commit 330203d3

mentioned in commit bbeef5be