Revert "use getAppWebPath() in here as well"

This reverts commit 6254f0a403e315461f8e20ebccf71cb91e9313a3.
OC_Util::setupFS($user) will create a data dir for the given string - no matter if the user really exists - OCP\JSON::checkUserExists($owner); introduces a ready to use check which will bail out with an JSON error
Merge branch 'master' into fix-setupfs-only-for-existing-users-master
isolate getExpireList function to make it testable
add first unit test for the versioning app
Replaced time() with uniqid() to make sure the file name is unique

The cache isn't cleared properly because unlink() doesn't remove the
cache entry which caused side-effects when reusing the same file name
(which randomly happens when time() returns the same value)

This fix first makes sure the unit tests don't fail any more.
The unlink() case with the cache will be investigated separately.
Merge pull request #6858 from owncloud/fix-setupfs-only-for-existing-users-master

OC_Util::setupFS($user) will create a data dir for the given string - no...
Merge pull request #6844 from owncloud/fix-css-loading-master

Revert "use getAppWebPath() in here as well"
Merge pull request #6868 from owncloud/enc-fixrandomfailunittest

Replaced time() with uniqid() to make sure the file name is unique
Merge pull request #6863 from owncloud/versioning_expire_function_tests

Versioning expire function tests
Merge branch 'master' into fixing-gallery-password-protected-access-master