[STORY] LPS-42584 As a Portal Administrator, I would like the ability to define which Social Relation types are allowed for Chat portlet

Hey Tamás,

Could you please take a look at this story as a pre-review before I'd send it to the component lead?
Here are my concerns in which regarding I'd you like to ask you to pay more attention:
- Property name "buddy.list.allowed.social.relation.types"
- Constants listed in portlet.props from SocialRelationConstants
- Overall impact for the behavior
- Running "ant build-service" for the portlet modifies some files (*Clp.java, EntryPersistenceImpl, *ClpInvoker.java) that are not related to my changes at first sight, so I might not include them in the autogenerated commit).

Let me know about your results.

Thanks!