Merge "Remove service_hosts.sh"

docker/centos/binary/base/Dockerfile

docker/centos/binary/base/service_hosts.sh

docker/centos/source/base/Dockerfile

docker/centos/source/base/service_hosts.sh

docker/common/base/kolla-common.sh

docker/common/base/service_hosts.sh

docker/fedora/binary/base/Dockerfile

docker/fedora/binary/base/service_hosts.sh

docker/fedora/source/base/Dockerfile

docker/fedora/source/base/service_hosts.sh

docker/ol/binary/base/Dockerfile

docker/ol/binary/base/service_hosts.sh

docker/ol/source/base/Dockerfile

docker/ol/source/base/service_hosts.sh

docker/rhel/binary/base/service_hosts.sh

docker/ubuntu/binary/base/Dockerfile

docker/ubuntu/binary/base/service_hosts.sh

docker/ubuntu/source/base/Dockerfile

docker/ubuntu/source/base/service_hosts.sh

tools/genenv