[Issue 6274][Test] Fixed integration Pulsar SQL test failed (#6279)

* Delete no use docker image

* Add get docker images for delete docker images

* Add command for get space size

* Add delete docker images

* Fixed error

* Upgrade postgresql from version 9.6 to 11

* Delete no used image first

* Fixed delete image

* Fixed docker images order

* Add maven install step

* Add option docker.nocache=true

* Fixed correct docker image

* Fixed integration test failed

* Delete debug info
diff --git a/docker/pulsar-standalone/Dockerfile b/docker/pulsar-standalone/Dockerfile
index 076d356..092e5cf 100644
--- a/docker/pulsar-standalone/Dockerfile
+++ b/docker/pulsar-standalone/Dockerfile
@@ -37,13 +37,13 @@
 # Note that the libpq-dev package is needed here in order to install
 # the required python psycopg2 package (for postgresql) later
 RUN apt-get update
-RUN apt-get -y install python2.7 python-pip postgresql-9.6 sudo nginx supervisor libpq-dev
+RUN apt-get -y install python2.7 python-pip postgresql sudo nginx supervisor libpq-dev
 
 # Python dependencies
 RUN pip2 install -r /pulsar/django/requirements.txt 
 
 # Postgres configuration
-COPY --from=dashboard /etc/postgresql/9.6/main/postgresql.conf /etc/postgresql/9.6/main/postgresql.conf
+COPY --from=dashboard /etc/postgresql/11/main/postgresql.conf /etc/postgresql/11/main/postgresql.conf
 
 # Configure supervisor
 COPY --from=dashboard /etc/supervisor/conf.d/supervisor-app.conf /etc/supervisor/conf.d/supervisor-app.conf