Use Ansible 5.x

Support most recent version of Ansible up to 5.x as default.

Change-Id: Ia2e9c78c56f6d0314471973e71de0b45e3309d71

releasenotes/notes/ansible-5.x-c6b4abf349caf632.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Ansible 5.x is now supported and used by default.

scripts/env-setup.sh

@@ -6,7 +6,7 @@ set -euo pipefail
 # NOTE(pas-ha) the above exports some useful variables like
 # $PYTHON , $PIP and $VENV depending on venv install or not
 
-DEFAULT_PIP_ANSIBLE='>=4,<5'
+DEFAULT_PIP_ANSIBLE='>=5,<6'
 
 ANSIBLE_COLLECTIONS_REQ=${ANSIBLE_COLLECTIONS_REQ:-$(dirname $0)/../ansible-collections-requirements.yml}
 ANSIBLE_COLLECTION_SOURCE_PATH=

tox.ini

@@ -86,7 +86,7 @@ deps =
 usedevelop = False
 allowlist_externals = bash
 deps =
-  ansible>=4,<5
+  ansible>=5,<6
   ansible-lint>=5,<6
 commands =
     bash tools/ansible-lint.sh