ENH/CI/BLD: Use latest tag for impala docker image in docker-compose.yml
ENH/CI/BLD: Use latest tag for impala docker image in docker-compose.yml

Author: Phillip Cloud <cpcloud@gmail.com>

Closes #1574 from cpcloud/latest-docker-images and squashes the following commits:

5f4ceb95 [Phillip Cloud] ENH/CI/BLD: Use latest tag for impala docker image in docker-compose.yml

ibis-project/ibis,ibis-project/ibis,cpcloud/ibis,cpcloud/ibis,cloudera/ibis,cloudera/ibis,ibis-project/ibis,cpcloud/ibis,deepfield/ibis,deepfield/ibis,deepfield/ibis,cpcloud/ibis,deepfield/ibis,cloudera/ibis,ibis-project/ibis