Merge branch 'fix-proto-files' into 'develop'

fix: change naming convention of rpc methods from snake case to camel case

Changelog:

- GetStream_kpi method changed to GetStreamKpi inside monitoring.proto.

- All names of rpc methods inside compute.proto changed from snake case to camel case.

FYI @caslanoglou @vapostolopoulos

See merge request teraflow-h2020/controller!14