Remove references to unsupported operating systems

All references to Gentoo, SUSE, Debian stretch and Centos-7  are removed.
Conditional tasks, ternary operators and variables are simplified where possible
OS specific variables files are generalised where possible

Change-Id: I508c7aea34bb706b58fc69be8bfb6c06d50f2f40

meta/main.yml

@@ -22,10 +22,11 @@ galaxy_info:
   platforms:
     - name: Debian
       versions:
-        - stretch
+        - buster
     - name: Ubuntu
       versions:
         - bionic
+        - focal
   categories:
     - cloud
     - python

tasks/manila_install.yml

@@ -29,7 +29,7 @@
   package:
     name: "{{ manila_package_list }}"
     state: "{{ manila_package_state }}"
-    update_cache: "{{ (ansible_pkg_mgr in ['apt', 'zypper']) | ternary('yes', omit) }}"
+    update_cache: "{{ (ansible_pkg_mgr == 'apt') | ternary('yes', omit) }}"
     cache_valid_time: "{{ (ansible_pkg_mgr == 'apt') | ternary(cache_timeout, omit) }}"
   register: install_packages
   until: install_packages  is success

vars/redhat.yml

@@ -29,7 +29,7 @@ manila_service_distro_packages:
   - openstack-manila
   - python-manilaclient
   - python2-shade
-  - "{{ ansible_distribution_major_version is version('8', '<') | ternary('systemd-python', 'python3-systemd') }}"
+  - python3-systemd
   - uwsgi
   - uwsgi-python
 
@@ -42,7 +42,7 @@ manila_scheduler_distro_packages: []
 manila_share_distro_packages: []
 
 manila_share_deps_distro_packages:
-  - "qemu-img{% if ansible_distribution_major_version|int <= 7 %}-ev{% endif %}"
+  - qemu-img
   - sqlite
 
 manila_lvm_share_distro_packages:

vars/suse.yml

@@ -1,61 +0,0 @@
----
-# Copyright 2019, VEXXHOST, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Common rpm packages
-manila_distro_packages:
-  - libffi-devel
-  - libkmod-devel
-  - libkmod2
-  - postgresql-devel
-  - libxslt-devel
-  - nfs-utils
-  - rpcbind
-  - rsync
-  - zlib-devel
-
-manila_service_distro_packages:
-  - openstack-manila
-  - python-manilaclient
-  - python-shade
-  - python-systemd
-  - uwsgi
-  - uwsgi-python
-
-manila_devel_distro_packages:
-  - git-core
-  - systemd-devel
-
-manila_api_distro_packages: []
-manila_scheduler_distro_packages: []
-manila_share_distro_packages: []
-
-manila_share_deps_distro_packages:
-  - qemu-tools
-  - sqlite3
-
-manila_lvm_share_distro_packages:
-  - device-mapper
-  - lvm2
-  - parted
-
-manila_rbd_share_distro_packages:
-  - ceph-fuse
-
-manila_oslomsg_amqp1_distro_packages:
-  - cyrus-sasl
-  - cyrus-sasl-plain
-  - cyrus-sasl-digestmd5
-
-manila_uwsgi_bin: '/usr/sbin'