Telemetry backend:

- Correct Dockerfile

src/telemetry/backend/Dockerfile

@@ -51,7 +51,7 @@ RUN touch __init__.py
 COPY proto/*.proto ./
 RUN python3 -m grpc_tools.protoc -I=. --python_out=. --grpc_python_out=. *.proto
 RUN rm *.proto
-RUN find . -type f -exec sed -i -E 's/(import\ .*)_pb2/from . \1_pb2/g' {} \;
+RUN find . -type f -exec sed -i -E 's/^(import\ .*)_pb2/from . \1_pb2/g' {} \;
 
 # Create component sub-folders, get specific Python packages
 RUN mkdir -p /var/teraflow/telemetry/backend