[docker] Also specify Flower pip version in Py2
@@ -63,7 +63,7 @@ RUN ./build/env/bin/pip install \
psycopg2-binary \
redis==2.10.6 \
django_redis \
- flower \
+ flower==0.9.7 \
# SparkSql show tables
git+https://github.com/gethue/PyHive \
# pyhive \
