Director/Envoy imperfections

[alexey-gruzdev]

• Docs for Director/Envoy - @igor-davidyuk - Docs for the director-envoy 1.2 update #154
• Redesign stream metrics - @igor-davidyuk - Redesign stream metrics #135
• Create structure for metric_origin, task_name, metric_name, metric_value, round_ - @igor-davidyuk - Redesign stream metrics #135
• Get trained model API - return dict - @igor-davidyuk - Redesign stream metrics #135
• Return single Tensor dict from function - @igor-davidyuk - Redesign stream metrics #135
• Rewrite test - @igor-davidyuk - Redesign stream metrics #135
• Timeout settings - @aleksandr-mokrov - Configure envoy health check period form director #153
• Collaborator working dir? - @aleksandr-mokrov -WIP: Python current work directory no longer changes when starting and stopping aggregator and collaborator #140 - not now
• Change order of context manager and move function definition - @dmitryagapov - move get experiment info in separate function #136
• Save archive to file instead of loading to memory - @aleksandr-mokrov - Save experiment archive to file instead store it in memory. #141
• Unify workspace import procedure - @aleksandr-mokrov - Workspace context manager #148
• Decorator instead of validate_caller? - @dmitryagapov - use client_id instead of cert name in no tls case #166
• Change sha384 checking over all codebase - @itrushkin Chunked implementation of SHA384 hash function #134
• Refactor getting binary files for step-ca - @dmitryagapov - Refactor getting step and step-ca binaries #144
• Create a variable for step_config, cert, pass_file, config - @dmitryagapov - Create global variables for CA files/paths #150
• If tls: instead of disable_tls over all codebase - @aleksandr-mokrov - Change variable disable_tls to tls to avoid twice no like "if not dis… #133
• Common naming for certs over all codebase - @dmitryagapov - Unify ca name #146
• Return error codes instead of single status in GRPC - @dmitryagapov - replace validate_caller -> get_sender #143 - changes not needed
• Set default path for step-ca/step CLI binary and certificates (i.e. ~/.local/workspace/) with standard naming convention ('director.crt', 'envoy_one.crt', 'envoy_two.crt', etc.) so long living entities can start without always providing path for root_cert, cert, and private_key (defaults can still be overridden) - separated issue was created Set default path for step-ca/step CLI binary and certificates #161
• Consistent director_uri flags for director and envoy - @aleksandr-mokrov - Pass director IP or FQDN and port instead URI #149
• Make error logs in director / envoy more informative - @aleksandr-mokrov - Full traceback call stack on broad exception handling. #157
• [Do not pass in step CA password from command line]
  (https://github.com/intel/openfl/blob/develop/openfl/interface/pki.py#L56) - @aleksandr-mokrov - Hidden CA password from command line #155