Remove OC_Apps::loadsApps() call

```OC_Apps::loadApps()``` is not allowed anymore in the latest ownCloud
master. The right apps are loaded automatically by core. LDAP
authentication works in ownCloud 7.

Closes #90.
Merge pull request #91 from owncloud/remove_ocapps_loadapps

Remove OC_Apps::loadsApps() call