Bump ansible version constraints to >=2.7,<2.10

This means that ansible 2.9 is typically used, and causes ansible-lint
to fail. Two workarounds have been added to address this:

* Use .get() to avoid passing an undefined object through to_nice_yaml
  filter
* Create a dummy tenks_update_state.py module to avoid ansible-lint
  being confused about our action plugin.

Change-Id: I54388f713e17a47601be2db63a26fc43ca7ac6c8

ansible/cleanup_state.yml

@@ -18,5 +18,7 @@
       copy:
         # tenks_schedule lookup plugin outputs a dict. Pretty-print this to
         # persist it in a YAML file.
-        content: "{{ new_state.result | to_nice_yaml }}"
+        # NOTE(mgoddard): Use .get to avoid a nasty error in ansible-lint
+        # (cannot represent an object).
+        content: "{{ new_state.get('result') | to_nice_yaml }}"
         dest: "{{ state_file_path }}"

ansible/library/tenks_update_state.py

@@ -0,0 +1,2 @@
+# NOTE(mgoddard): Dummy module to fudge ansible-lint into working.
+# tenks_update_state is actually an action_plugin.

ansible/roles/virtualbmc-daemon/tasks/main.yml

@@ -12,7 +12,7 @@
 - name: Ensure package dependencies are installed
   package:
     name: "{{ vbmcd_packages }}"
-    state: installed
+    state: present
   register: result
   until: result is success
   retries: 3

ansible/schedule.yml

@@ -50,5 +50,7 @@
       copy:
         # tenks_schedule lookup plugin outputs a dict. Pretty-print this to
         # persist it in a YAML file.
-        content: "{{ new_state.result | to_nice_yaml }}"
+        # NOTE(mgoddard): Use .get to avoid a nasty error in ansible-lint
+        # (cannot represent an object).
+        content: "{{ new_state.get('result') | to_nice_yaml }}"
         dest: "{{ state_file_path }}"

releasenotes/notes/ansible-2.7-2.8-63f01fbf5ab9ba08.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Updates the minimum allowed version of Ansible from 2.6 to 2.7, and the
+    maximum allowed version from 2.7.x to 2.9.x.

requirements.txt

@@ -4,6 +4,6 @@
 
 pbr>=2.0 # Apache-2.0
 # NOTE(mgoddard): Ansible 2.8.0 breaks ansible-lint.
-ansible>=2.6.0,<2.8.0 # GPLv3
+ansible>=2.7.0,<2.10.0 # GPLv3
 os-client-config # Apache-2.0
 selinux;python_version>='3' # MIT