CI: Fix py27/py36/py37 jobs

Stop using bionic for py27 and py37; we can use pyenv to install it on
jammy.

The py36 job still needs bionic; pin ansible to version 9 now that 11
is the default.

Conflicts:
  .zuul.yaml

Change-Id: I83e3bc609433995875e47c4103ca945154088a65
Signed-off-by: Tim Burke <tim.burke@gmail.com>
Co-Authored-By: Alistair Coles <alistairncoles@gmail.com>
Related-Change: Ida8be4477116d3b44e3d7b470a183d2298e2d3d5
Related-Change: I16af4fc74974979bdf68390b42b2f571a8183a05
(cherry picked from commit 972baf30df)
(cherry picked from commit dc98a84635)
(cherry picked from commit fc6a049426)

.zuul.yaml

@@ -14,6 +14,7 @@
 - job:
     name: swift-tox-py27
     parent: swift-tox-base
+    nodeset: ubuntu-focal
     description: |
       Run unit-tests for swift under cPython version 2.7.
 
@@ -22,6 +23,9 @@
       tools/test-setup.sh.
     vars:
       tox_envlist: py27
+      bindep_profile: test py27
+      python_use_pyenv: True
+      python_version: 2.7
       tox_environment:
         NOSE_COVER_HTML: 1
         NOSE_COVER_HTML_DIR: '{toxinidir}/cover'
@@ -31,6 +35,7 @@
     name: swift-tox-py36
     parent: swift-tox-base
     nodeset: ubuntu-bionic
+    ansible-version: 9
     description: |
       Run unit-tests for swift under cPython version 3.6.
 
@@ -40,6 +45,7 @@
     vars:
       tox_envlist: py36
       bindep_profile: test py36
+      python_version: 3.6
       tox_environment:
         NOSE_COVER_HTML: 1
         NOSE_COVER_HTML_DIR: '{toxinidir}/cover'
@@ -48,7 +54,6 @@
 - job:
     name: swift-tox-py37
     parent: swift-tox-base
-    nodeset: ubuntu-bionic
     description: |
       Run unit-tests for swift under cPython version 3.7.
 
@@ -58,6 +63,7 @@
     vars:
       tox_envlist: py37
       bindep_profile: test py37
+      python_use_pyenv: True
       python_version: 3.7
       tox_environment:
         NOSE_COVER_HTML: 1
@@ -121,6 +127,7 @@
 - job:
     name: swift-tox-func-py27
     parent: swift-tox-base
+    nodeset: ubuntu-focal
     description: |
       Run functional tests for swift under cPython version 2.7.
 
@@ -129,6 +136,9 @@
       tools/test-setup.sh.
     vars:
       tox_envlist: func
+      bindep_profile: test py27
+      python_use_pyenv: True
+      python_version: 2.7
 
 - job:
     name: swift-tox-func-py38
@@ -215,7 +225,7 @@
 
 - job:
     name: swift-tox-func-encryption-py27
-    parent: swift-tox-base
+    parent: swift-tox-func-py27
     description: |
       Run functional tests for swift under cPython version 2.7.
 
@@ -227,7 +237,7 @@
 
 - job:
     name: swift-tox-func-ec-py27
-    parent: swift-tox-base
+    parent: swift-tox-func-py27
     description: |
       Run functional tests for swift under cPython version 2.7.
 
@@ -403,6 +413,7 @@
     nodeset: ubuntu-jammy
     vars:
       bindep_profile: test py27
+      python_use_pyenv: True
       python_version: 2.7
       tox_environment:
         TMPDIR: '{{ ansible_env.HOME }}/xfstmp'