Added custom LofarDeviceProxy to enhance support for high-dimensional arrays in attribtues

docker/Dockerfile.ci_python37

+FROM python:3.7-buster
+
+# Install PyTango dependencies
+RUN apt-get update -y
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y libboost-python-dev libtango-dev
+
+# Make sure we have the latest tooling for our tests
+RUN python -m pip install --upgrade pip
+RUN pip install --upgrade tox