Previously a schema or data locatio that was a directory would
result in an attempt being made to apply the directory listing as
SQL scripts. This would typically result in a hard to diagnose
failure due to the directory listing not being valid SQL.
This commit updates the initializer to ignore locations for
which the Resources is not readable. This works as Framework's
Resource abstraction does not consider directory resources to be
readable.
Closes gh-36386
35d3cdbe74