Work around

phase1/Dockerfile

@@ -127,7 +127,8 @@ RUN apt-get update && \
 WORKDIR /tmp
 
 RUN ${PYTHON} -m pip install --no-cache-dir setuptools && \
-    ${PYTHON} -m pip install tensorflow==2.0.0b1 && \
+    ${PYTHON} -m pip install --upgrade pip && \
+    ${PYTHON} -m pip install tensorflow==1.15.3 && \
     find "${INTEL_OPENVINO_DIR}/" -type f -name "*requirements*.*" -path "*/${PYTHON}/*" -exec ${PYTHON} -m pip install --no-cache-dir -r "{}" \; && \
     find "${INTEL_OPENVINO_DIR}/" -type f -name "*requirements*.*" -not -path "*/post_training_optimization_toolkit/*" -not -name "*windows.txt"  -not -name "*ubuntu16.txt" -not -path "*/python3*/*" -not -path "*/python2*/*" -exec ${PYTHON} -m pip install --no-cache-dir -r "{}" \;