Add FL http cycle request endpoint (#497)
Add FL http cycle request endpoint (#497)

* [WIP] add federated/cycle-request endpoint to gateway routes

* [WIP] enable worker to get cycles and update cycle-request endpoint

* no changes. just to avoid overwritten by merge

* (fix) remove get_cycles function

OpenMined/PySyft,OpenMined/PySyft,OpenMined/PySyft,OpenMined/PySyft