Resolve "Add RabbitMQ for MessageBus triggers"

Closes #1 (closed)

\approve @ds @gislars

Dockerfile

@@ -6,12 +6,12 @@ RUN apt-get update \
     postgresql-contrib \
     postgresql-$PG_MAJOR-postgis-$POSTGIS_VERSION \
     postgresql-$PG_MAJOR-postgis-$POSTGIS_VERSION-scripts \
-    git-all \
-    build-essential; \
+    build-essential \
+    python3-pip \
+    python-dev \
+    python-setuptools; \
     done \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/*
-WORKDIR /tmp
-RUN git clone https://github.com/omniti-labs/pg_amqp.git
-WORKDIR /tmp/pg_amqp
-RUN make && make install
+RUN pip install pgxnclient
+RUN pgxnclient install pg_amqp