Remove functional tests gate for centos7 and workarounds for python2

CentOS 7 job is running with python2, which is no longer supported by
nova. Devstack also dropped it's platform tests for CentOS.

Change-Id: I74b04cf6ecd978bfc5fbf3b2c7484a79d28ae826

.zuul.yaml

@@ -8,19 +8,20 @@
       jobs:
         - novajoin-functional:
             voting: false
-        - novajoin-functional-py3:
-            voting: false
 
 - job:
     name: novajoin-functional
     description: |
       Run functional tests for novajoin.
     parent: devstack-tox-base
-    nodeset: devstack-single-node-centos-7
+    nodeset: devstack-single-node-fedora-latest
     pre-run: playbooks/functional/pre.yaml
     run: playbooks/functional/run.yaml
     post-run: playbooks/functional/post.yaml
     vars:
+      tox_envlist: functional-py3
+      bindep_profile: test py3
+      python_version: 3
       devstack_services:
         # FreeIPA is using Apache with TLS
         tls-proxy: false
@@ -46,14 +47,3 @@
           # Disable Cinder services
           c-bak: false
           c-vol: false
-
-- job:
-    name: novajoin-functional-py3
-    description: |
-      Run functional tests under Python 3.
-    parent: novajoin-functional
-    nodeset: devstack-single-node-fedora-latest
-    vars:
-      tox_envlist: functional-py3
-      bindep_profile: test py3
-      python_version: 3

roles/configure-freeipa/tasks/main.yaml

@@ -1,21 +1,3 @@
-- name: Find Paramiko ssh_gss.py
-  command: python -c "from paramiko import ssh_gss; print(ssh_gss.__file__.rstrip('c'))"
-  register: ssh_gss_file
-
-- name: Patch Paramiko (https://github.com/paramiko/paramiko/pull/1311)
-  replace:
-    path: '{{ ssh_gss_file.stdout }}'
-    regexp: 'GSS_EXCEPTIONS = \(gssapi.GSSException,\)'
-    replace: 'GSS_EXCEPTIONS = ()'
-  become: true
-
-- name: Patch Paramiko (https://github.com/paramiko/paramiko/pull/1311)
-  replace:
-    path: '{{ ssh_gss_file.stdout }}'
-    regexp: 'GSS_AUTH_AVAILABLE = True'
-    replace: 'GSS_AUTH_AVAILABLE = False'
-  become: true
-
 - name: Install paramiko to patch it (Python3)
   pip:
     name: paramiko
@@ -100,16 +82,3 @@
     --forwarder={{ unbound_primary_nameserver_v4 | default('1.1.1.1') }}
     --forwarder={{ unbound_secondary_nameserver_v4 | default('8.8.8.8') }}
   become: true
-
-- name: Remove system python-decorator package which conflicts with devstack
-  command: rpm -e --nodeps python-decorator-3.4.0-3.el7.noarch
-  become: true
-  ignore_errors: yes
-  when: python_version is not defined
-
-- name: Install the latest decorator module for devstack
-  pip:
-    name: decorator
-    state: forcereinstall
-  become: true
-  when: python_version is not defined

scripts/novajoin-install

@@ -237,13 +237,16 @@ def install(opts):
             join_config.write(f)
 
     logger.info('Importing IPA metadata')
+    #NOTE(xek): pass in os.environ, because ipautils overwrites PATH otherwise
     (stdout, stderr, returncode) = run(
         ['glance',
          '--os-image-api-version',
          '2',
          'md-namespace-import',
          '--file',
-         '/usr/share/novajoin/freeipa.json'], raiseonerr=False)
+         '/usr/share/novajoin/freeipa.json'],
+        raiseonerr=False,
+        env=os.environ)
     if returncode != 0:
         logger.error('Adding IPA metadata failed: %s' % stderr)