Fixing bug in filter classloader

Signed-off-by: RedChrome <redchrome@gmx.de>
changed case of dir include/plugins/Filter to filter
changing dir to plugin validators

Signed-off-by: RedChrome <redchrome@gmx.de>
moving files to rename file dir

Signed-off-by: RedChrome <redchrome@gmx.de>
changed case of dir - part 2 complete

Signed-off-by: RedChrome <redchrome@gmx.de>
fixing classloader for filter

Signed-off-by: RedChrome <redchrome@gmx.de>
Fixing some errors from code sniffer

Signed-off-by: RedChrome <redchrome@gmx.de>
Changing namespace of some classes (captcha, tests)

Signed-off-by: RedChrome <redchrome@gmx.de>