fix: Fix make build failed

Since poetry 1.1.8 version introduces a large number of bugs[1], which
makes the process of building container image fail, so the 1.1.8
version of poetry is not used.

[1] https://github.com/python-poetry/poetry/issues/4429

Change-Id: Ia30c2c5e783401aa4bad85139b0bf2fa9a822847

container/Dockerfile

@@ -37,7 +37,7 @@ RUN export LANG=C.UTF-8 \
     && rm -rf /usr/bin/python /usr/bin/pip \
     && ln -s /usr/bin/python3 /usr/bin/python \
     && ln -s /usr/bin/pip3 /usr/bin/pip \
-    && pip install poetry \
+    && pip install poetry!=1.1.8 \
     && poetry config virtualenvs.create false \
     && mkdir -p /etc/skyline /var/log/skyline/ /var/lib/skyline \
     && cd /skyline \