Fixes https://github.com/owncloud/core/issues/12188 for AppFramework apps

fix docstrings

adjust copyright date

another copyright date update

another header update

implement third headers argument, fix indention, fix docstrings

fix docstrings

Entity properties are marked as ```protected``` to correctly reflect the
documentation.

See also owncloud/documentation@644f2eedac8e912c3019366b29ecdfbd9a15c5d9

* swift causes some timeouts and test failures

and rename file to be lowercase

use fetch method instead of fetchRow because fetchRow is only an owncloud internal alias that exists purely for compability

add test for not failing when adding more comments after type parameters, do not limit x-www-form-urlencoded to POST

remove methodannotationreader namespace

fix namespace for server container

fix tests

fail if with cors credentials header is set to true, implement a reusable preflighted cors method in the controller baseclass, make corsmiddleware private and register it for every request

remove uneeded  local in cors middleware registratio

dont uppercase cors to easily use it from routes

fix indention

comment fixes

explicitely set allow credentials header to false

dont depend on better controllers PR, fix that stuff later

split cors methods to be in a seperate controller for exposing apis

remove protected definitions from apicontroller since controller has it

default to GET request when no method is set to fix unittests, also set parsed json parameters on the post attribute