[Yanel-dev] dependency to security library

[Josias Thöny]

Hi all,

FYI, we have removed the dependency to the security-core lib from the 
yanel resources/realms.
Everything should still work as before because this dependency is 
specified in the yanel-core pom, so it's included as a transitive 
dependency in each resource.

This dependency can be safely removed from all custom resources/realms, 
which will make updates of the security package easier.

josias