Refs #1456

Fixing failing integration tests now that Sort filter is called by default with 'desc'.

Note: to fix integration tests, compare tests/integration/processed and tests/integration/expected/ with a file compare tool (like WinMerge on windows). If it looks good, copy processed/* files over the expected/* and tests will pass.

git-svn-id: http://dev.piwik.org/svn/trunk@2484 59fd770c-687e-43c8-a1e3-f5a4ff64c105