[UAA] add registrar template and emit_registrar_config function
[UAA] add runing registrar service after UAA service
[UAA] fix issues in registrar start up
chages to config
[UAA] refactor emit_config functions
[UAA] make flake8 happier
[UAA] add find_config_parameter that searches in relations config and charm config
Merge pull request #9 from Altoros/registrar

Registrar fixed.