Increase oracle xe user process limit from 40 (default) to 150
Extra (now passing) oracle test which led to the work in 37b5ab51

Grumble - this was such a simple thing to diagnose and it took a month to
see it. The culprit was the (correctly bisected to) cleanup in d87929a4,
which failed to take into account that an empty connect() can still lead
to a healthy $dbh, given system-based authoriozation, and no attributes
being passed in.

For the curious - the difficulty to diagnose was further exacerbated by
the apparent insanity of what was being generated - a (known, existing)
method name was somehow leaking into the generated SQL. In reality when
we failed to determine the driver, we also failed to determine the SQLA
subclass, which in turn made us call a nonexisting method on $sql_maker,
but *surprise* - SQL::Abstract (the granddady of it all) defines an
AUTOLOAD. Khaaaaaaaaaaaaa....
Pass the correct NAME attribute to our dummy EUMM invocation
Convert many live-only SQL test to standalone is_same_sql_bind cases
Revert parts of e1ab2f7a, the depchain got perturbed again

Latest strictures now instist on bringing in the extra deps, which can't
be installed without working configure_requires
Remove 37b5ab51 test warnings on older perls