Updating the ADODB to 5.19 (Bug #1384473)

Includes fixes for:
mysql/mysqli: Fix ability for MetaTables to filter by table name,
broken since 5.15.
See http://phplens.com/lens/lensforum/msgs.php?id=19359

postgres8: New class/type with correct behavior for _insertid().

postgres9: Fixed assoc problem.
See http://phplens.com/lens/lensforum/msgs.php?id=19296

Change-Id: If54f95815015ab9b7f58e102fb6c65cd086b8ac2
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
adodb: RecordSet_postgres7->MoveNext() - remove expensive is_array()

Bug 1384473

And implicit count() of the array keys/columns. This saves a good 5%
of the exec time of get_records('config')

(cherry picked from commit 4652e5617d9616e3f61e78df5a4c863e16ac5634)

Change-Id: I1b1addb0ade04eabc4d923d242261ed09fae4cea
Signed-off-by: Francois Marier <francois@catalyst.net.nz>
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>