if possible"
- many new test cases
- more and improved comments
New files: t/ps_7ndb.test test suite for NDB tables
r/ps_7ndb.result expected results
include/ps_conv.inc conversion test cases
+ review comments and fixes.
They are separated from the other WL#1856 stuff, because they improve the behaviour of the current tests.
Make the result sets (order of rows) more predictable by using ORDER BY.