L2SS-365: Pin recordclass package for pypcc-sim image

docker-compose/pypcc-sim/Dockerfile

 FROM ubuntu:20.04
 
+COPY requirements.txt /requirements.txt
+
 RUN apt-get update && apt-get install -y python3 python3-pip python3-yaml git && \
-    pip3 install opcua numpy recordclass && \
+    pip3 install -r requirements.txt && \
     git clone --depth 1 --branch master https://git.astron.nl/lofar2.0/pypcc
 
 WORKDIR /pypcc

docker-compose/pypcc-sim/requirements.txt

+opcua
+numpy
+recordclass>=0.16,<0.16.1
\ No newline at end of file