Add uninstall_from_xmldb_file

[Andrew Nicols]

Add support to uninstall tables from xmldb

This is part of the work to provide unit testing

[Andrew Nicols (dobedobedoh)]

Submitted Penny's patch for this (with minor alternations): https://reviews.mahara.org/#change,638

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/638
Committed: http://gitorious.org/mahara/mahara/commit/82ff646682c993a871bfa3040dbef6c611d0f3ed
Submitter: Francois Marier (<email address hidden>)
Branch: master

commit 82ff646682c993a871bfa3040dbef6c611d0f3ed
Author: Penny Leach <email address hidden>
Date: Sat Aug 22 17:19:36 2009 +0200

    Bug #841694: Add uninstall_from_xmldb support

    This is the corrollary of install_from_xmldb_file, except it reverses
    the order of anything and removes all keys, indexes and drops the table.

    Change-Id: I2568a7b9dd1f7fe1a5ba0f8751434fd0caf7328a
    Signed-off-by: Penny Leach <email address hidden>

[François Marier (fmarier)]

Leaving open for now because Hugh says it doesn't work on MySQL...

[Melissa Draper (melissa)]

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 status fixreleased
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