Add RHEL 9.0, Ubuntu 22.04 and Fedora 36 to CI (#358)

* Add RHEL 9.0 to CI.

* Add RHEL 9 specific files.

* Add Ubuntu 22.04 and Fedora 36 to CI.

* Another try.

* Adjust kernel memory tests.

* Add more details.

* RHEL 9 doesn't support setting memory swappiness.

* Fix docker_swarm_service tests.

The 'less' case should always have been changed, but it probably was always skipped
due to a too old Docker SDK for Python or a too old Docker daemon.

* More checks / improve checks.

.azure-pipelines/azure-pipelines.yml

@@ -128,16 +128,16 @@ stages:
           targets:
             - name: CentOS 7
               test: centos7
-            - name: Fedora 34
-              test: fedora34
+            - name: Fedora 36
+              test: fedora36
             - name: Fedora 35
               test: fedora35
             - name: openSUSE 15
               test: opensuse15
             - name: Ubuntu 18.04
               test: ubuntu1804
-            - name: Ubuntu 20.04
-              test: ubuntu2004
+            - name: Ubuntu 22.04
+              test: ubuntu2204
             - name: Alpine 3
               test: alpine3
           groups:
@@ -170,8 +170,8 @@ stages:
           targets:
             - name: CentOS 8
               test: centos8
-            # - name: Fedora 34
-            #   test: fedora34
+            - name: Fedora 34
+              test: fedora34
             - name: Ubuntu 20.04
               test: ubuntu2004
           groups:
@@ -251,7 +251,7 @@ stages:
           testFormat: devel/rhel/{0}
           targets:
             - test: '7.9'
-            - test: '8.5-pypi-latest'
+            - test: '9.0-pypi-latest'
           groups:
             - 1
             - 2
@@ -267,7 +267,7 @@ stages:
           nameFormat: RHEL {0}
           testFormat: 2.13/rhel/{0}
           targets:
-            - test: '7.9'
+            - test: '8.5'
           groups:
             - 1
             - 2