Removed old CLI cruft and pushed tests onward

api/proto/gosdnCLI.pb.go

api/proto/gosdnCLI.proto

cli/path_traversal.go

cmd/gosdn/gosdn

mocks/GrpcCliClient.go

mocks/GrpcCliServer.go

mocks/GrpcCli_CreateLogStreamClient.go

mocks/GrpcCli_CreateLogStreamServer.go

nucleus/cli-handling.go

nucleus/cli-handling_test.go

nucleus/gnmi_transport_test.go

nucleus/integration_test.go

nucleus/nucleus-core.go

nucleus/southbound_test.go

nucleus/util/message_tools_test.go

nucleus/util/path/path_traversal.go

nucleus/util/path/path_traversal_test.go

nucleus/util/path_traversal_test.go

nucleus/util/proto/message.go

nucleus/util/proto/message_test.go