[TASK] Clean up ext_emconf files

The md5 value is not handled in core for quite a while
and removed together with some obsolete locallang flags
and further test related ext_emconf settings.

Resolves: #67979
Releases: master
Change-Id: I86804f732f7f32cf94aab7d18dfab79cdf67e458
Reviewed-on: http://review.typo3.org/41005


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: Frank Nägler <frank.naegler@typo3.org>