refactor(test-deployment): dockerfile and test script cleanup

utils/test-deployment/Dockerfile

@@ -1,6 +1,6 @@
 FROM python:3.8-slim
 
 COPY utils/test-deployment .
-RUN ./install_prerequisites.sh
+RUN pip install -r requirements.txt
 
 CMD [ "./run_tests.py" ]

utils/test-deployment/install_prerequisites.sh

@@ -2,5 +2,4 @@
 
 set -e
 
-# pip install specklepy
-pip install -r requirements.txt
+pip install specklepy