WL-2763 set request attributes for course.admin
WL-2763 Switch to use the existing pattern.

For dependent services the existing pattern was to have a field holding the service.
Switching serverConfigurationService to use this pattern.
Also switched to init() for setting up the services.
Merge pull request #58 from ox-it/WL-2763

WL-2763 set request attributes for course.admin