Workaround ansible-lint installation failure

* Bumps ansible-lint to master vesion (which got fix)
* Resolves bug with vars file placed inside tasks folder which caused
  linter to crash parsing them.
  ansible/ansible-lint#595
* Includes tox.ini fix for HTTP proxies

Partial-Bug: #1848512
Partial-Bug: ansible/ansible-lint#590
Partial-Bug: ansible/ansible-lint#595
Change-Id: Ib505b05ef909d0ded9dd87a67166b8f821d62d14

.ansible-lint

@@ -1,11 +1,14 @@
 ---
 parseable: true
 skip_list:
+  # One two excuses for adding skips: bugs in linter and recent linter bumping
   - ANSIBLE0006
   - ANSIBLE0012
   - ANSIBLE0016
   - '204'  # [E204] Lines should be no longer than 120 chars
+  - '306'  # [E306] Shells that use pipes should set the pipefail option
   # E602 https://github.com/ansible/ansible-lint/issues/450
   - '602'  # [E602] Don't compare to empty string
   # E405 is too new and we need to enable it in a separate change
   - '405'  # [E405] Remote package tasks should have a retry
+  - '701'  # [E701] No 'galaxy_info' found

.pre-commit-config.yaml

@@ -35,8 +35,10 @@ repos:
         files: \.(yaml|yml)$
         types: [file, yaml]
         entry: yamllint --strict -f parsable
-  - repo: https://github.com/ansible/ansible-lint
-    rev: v4.0.1
+  # Revert to upstream branch fix for bug below is released (tagged)
+  # https://github.com/ansible/ansible-lint/issues/595
+  - repo: https://github.com/ansible/ansible-lint.git
+    rev: 0523c63f193d65313dcd743686d7fb0623a72ee8
     hooks:
       - id: ansible-lint
         files: \.(yaml|yml)$

roles/libvirt/teardown/nodes/tasks/main.yml

@@ -5,7 +5,7 @@
 
 - name: Include vars for libvirt-nodepool
   include_vars:
-    file: "{{ role_path }}/../../setup/overcloud/tasks/vars/libvirt_nodepool_vars.yml"
+    file: "{{ role_path }}/../../setup/overcloud/vars/libvirt_nodepool_vars.yml"
   when: libvirt_nodepool|default(false)
 
 - name: Check if libvirt is available

tox.ini

@@ -23,9 +23,12 @@ setenv =
     PIP_DISABLE_PIP_VERSION_CHECK=1
 passenv =
     ANSIBLE_*
+    CURL_CA_BUNDLE
     DOCKER_*
     MOLECULE_*
+    REQUESTS_CA_BUNDLE
     SSH_AUTH_SOCK
+    SSL_CERT_FILE
     TERM
 deps = -r{toxinidir}/test-requirements.txt
 whitelist_externals =