Reject isolation test specifications with duplicate step names.

Robert Haas <rhaas@postgresql.org>

Commit: 43b4a16817c8b5568cec72f3b0e1c8209f5ac7f7
Author: Robert Haas <rhaas@postgresql.org>
Date: 2015-08-15T02:10:46Z
Releases: 9.6.0
Reject isolation test specifications with duplicate step names.

alter-table-1.spec has such a case, so change one instance of step
rx1 to rx3 instead.

Files