Clean up older tempest distro releases

Currently tempest has several older linux distro Dockerfiles that
are either not maintained or used, this change removes them to
reduce the number of build targets we are doing to focus more
on what we actually use.

Change-Id: I01c1e2c39f76adebf05640c36af492121309e8d3

tempest/Cloud:OpenStack:Master-openSUSE_Leap_15.0.gpgkey

@@ -1,21 +0,0 @@
------BEGIN PGP PUBLIC KEY BLOCK-----
-Version: GnuPG v1.4.5 (GNU/Linux)
-
-mQENBFJUCd0BCADFph1AX+yZq5eKs8t3jRNyP8JDKghPQTTC6/rpPC2cLaSff4zB
-CNAh6G3Mqyv5TjRirqC841sMXCnFKCPJxAPrH/TLJonCsAFJNS7RHROw3ixL+puK
-fsaOrVlxd18NxnrOoQM4kb34WiRmCoLHi7yuuoD8QF6cIQKuAfYUWK6OmED07Tdz
-Exs2Pfnp9k9W1BbasVS/zBFq8e7qTTw86ZJDcd8CImsBzH/vQyrQRjnrNdCnPzjG
-sBnVoZJrnw/edAESykczR21/CB8a8nwPVFwV6UiWFp9Ngx4tY0b20E/KjB7zyt8C
-2dUsuOIlyQ3bHxIGAsRvPLMlRGGjmUEva77DABEBAAG0QENsb3VkOk9wZW5TdGFj
-ayBPQlMgUHJvamVjdCA8Q2xvdWQ6T3BlblN0YWNrQGJ1aWxkLm9wZW5zdXNlLm9y
-Zz6JATwEEwECACYFAluG5fgCGwMFCQ1RjBsGCwkIBwMCBBUCCAMEFgIDAQIeAQIX
-gAAKCRCJOpDa2F+TFvkoCACUjMX5XanZ246W57GDqQaBRBGlA/PLDionA0T/O7eV
-J0EquuHTrAZ3JmrJKu9wfvLyXG6r86wQ1FI0KuRA7EP9jsm+ayVevUx28a9/e7wj
-H5h2BJpP6gx3ukqfj92uJBuZHOvlcDYo9ThNEzDi7STvpHNOp/L3mR3bqi00Vb1u
-WQv//xPu5Hncq8Z1y+0Tk4BN8rIqheuKpvBzjgPHxt5ql+bhYGBM/NTPOaFwvwUQ
-w7/iB0jlnadM6frwvM2OxHAidDZLXpklEZrzVYC3NH6mr9JxRbFhZIGDPxsmgu9N
-zQ+8nxzmpprYiZ9qQfDn8Ke7epyROqTuUpA/LJFyagGQiEYEExECAAYFAlJUCd0A
-CgkQOzARt2udZSMmlACgirHQ0aJSPUcF2km6Gr4zMq2sRzIAoKZla9GZEL6Wl6aH
-cmd3/2i/nNmx
-=hpCE
------END PGP PUBLIC KEY BLOCK-----

tempest/Dockerfile.opensuse_15

@@ -1,21 +0,0 @@
-ARG FROM=opensuse/leap:15.0
-FROM ${FROM}
-LABEL maintainer="cloud-devel@suse.com"
-
-ARG VERSION=Master
-ARG KEYFILE=Cloud:OpenStack:Master-openSUSE_Leap_15.0.gpgkey
-
-COPY ${KEYFILE} /tmp/
-RUN rpm --import /tmp/${KEYFILE}
-RUN rm /tmp/${KEYFILE}
-
-RUN set -ex ;\
-    zypper --non-interactive addrepo http://download.opensuse.org/repositories/Cloud:/OpenStack:/${VERSION}/openSUSE_Leap_15.0/ openstack-${VERSION} ;\
-    zypper --non-interactive refresh ;\
-    zypper --non-interactive up -y ;\
-    zypper --non-interactive install -y openstack-tempest \
-                                        python3-cinder-tempest-plugin \
-                                        python3-heat-tempest-plugin \
-                                        python3-keystone-tempest-plugin \
-                                        python3-neutron-tempest-plugin ;\
-    zypper --non-interactive clean -a

tempest/Dockerfile.ubuntu_bionic

@@ -1,27 +0,0 @@
-ARG FROM=ubuntu:18.04
-FROM ${FROM}
-
-RUN set -ex ;\
-    export DEBIAN_FRONTEND=noninteractive ;\
-    apt-get update ;\
-    apt-get upgrade -y ;\
-    apt-get install netbase -y ;\
-    apt-get install --no-install-recommends -y \
-        python3-dev \
-        build-essential \
-        python3-pip \
-        libssl-dev \
-        git ;\
-    pip3 install -U pip ;\
-    git clone https://git.openstack.org/openstack/tempest ;\
-    git clone https://git.openstack.org/openstack/cinder-tempest-plugin ;\
-    git clone https://git.openstack.org/openstack/heat-tempest-plugin ;\
-    git clone https://git.openstack.org/openstack/keystone-tempest-plugin ;\
-    git clone https://git.openstack.org/openstack/neutron-tempest-plugin ;\
-    pip3 install -U setuptools==58.0.0 ;\
-    pip3 install wheel ;\
-    pip3 install -e tempest/ \
-                    cinder-tempest-plugin/ \
-                    heat-tempest-plugin/ \
-                    keystone-tempest-plugin/ \
-                    neutron-tempest-plugin/ ;\

zuul.d/tempest.yaml

@@ -34,12 +34,6 @@
     vars: &tempest_vars
       currentdate: "{{ now(utc=True,fmt='%Y%m%d') }}"
       docker_images:
-        - context: tempest
-          repository: openstackhelm/tempest
-          dockerfile: Dockerfile.ubuntu_bionic
-          tags:
-            - latest-ubuntu_bionic
-            - "ubuntu_bionic-{{ currentdate }}"
         - context: tempest
           repository: openstackhelm/tempest
           dockerfile: Dockerfile.ubuntu_focal