OpenAPI - registrar manager implemented (#2613)
OpenAPI - registrar manager implemented (#2613)

* OpenAPI - registrar manager implemented
* methods in registrar manager implemented

CESNET/perun,balcirakpeter/perun,martin-kuba/perun,zwejra/perun,CESNET/perun,zlamalp/perun,zwejra/perun,balcirakpeter/perun,zlamalp/perun,zoraseb/perun,zlamalp/perun,zlamalp/perun,balcirakpeter/perun,mvocu/perun,balcirakpeter/perun,zlamalp/perun,martin-kuba/perun,zlamalp/perun,martin-kuba/perun,mvocu/perun,zoraseb/perun,martin-kuba/perun,zwejra/perun,mvocu/perun,martin-kuba/perun,zoraseb/perun,CESNET/perun,mvocu/perun,balcirakpeter/perun,mvocu/perun,zwejra/perun,CESNET/perun,zoraseb/perun,martin-kuba/perun,mvocu/perun,zoraseb/perun,CESNET/perun,CESNET/perun,CESNET/perun,balcirakpeter/perun,martin-kuba/perun,zwejra/perun,balcirakpeter/perun,zwejra/perun,zlamalp/perun,mvocu/perun,zoraseb/perun