Fix RunTest::testIndexWithSearch for Pdo searcher

[glensc]

It expects direction parameter passed by:

2) XHGui\Test\Controller\RunTest::testIndexWithSearch
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'asc'
+'desc'

this includes one fix to backends disparity:

• Equalize data store backends #320

[glensc]

the hardcoded 'desc' was added in e53cc4d via #244

edit: the commit before squashing: 949134f

@1ma if you could shed some light was there a reason for that it would be awesome.

[1ma]

Can't think of any good reason, I only got to a partial implementation.

In line 194 the DESC clause is hardcoded in the SQL query, if you are going to fix this I guess you should amend that too.