This commit updates our monkey patch of
`ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.new_client` to
improve two things:
1. Improve the conditional used to determine if a database does not
exist. Just checking that the error message contains the `database`
name is not sufficient as the value of the database name may be part of
the `host` connection param which can appear in PG error messages as
well.
2. When the PG error messages includes the `user` or `host` connection
param. We append the original PG error message on to the original
error messge so that we don't just end up with a generic error message
that doesn't help us to figure out the actual error.
a406316dde
