Add gevent and pykafka

Author: aadams19

monasca-api-python/Dockerfile

@@ -40,7 +40,7 @@ ENV CONFIG_TEMPLATE=true \
 
 COPY apk_install.sh /apk.sh
 RUN /build.sh -r ${API_REPO} -b ${API_BRANCH} \
-  -q ${CONSTRAINTS_BRANCH} -d "gunicorn influxdb python-memcached Jinja2" && \
+  -q ${CONSTRAINTS_BRANCH} -d "gunicorn influxdb python-memcached Jinja2 gevent pykafka" && \
   rm -rf /build.sh
 
 COPY api-* /etc/monasca/