BC-2500: add method for find people by customer role and system role
Conflicts:
	couchdb/src/main/java/org/soluvas/couchdb/CouchDbPersonRepository.java
	data/src/main/java/org/soluvas/data/person/EmfPersonRepository.java
	data/src/main/java/org/soluvas/data/person/PersonRepository.java
	mongo/src/main/java/org/soluvas/mongo/MongoPersonRepository.java