jira: cast error messages to strings (#707)

Sometimes Jira returns dicts as "errors" instead of simple strings.
For example, when a user specifies a field that cannot be set, Jira
returns a dict with the field name as a key and the error message as the
value.

In the rare case that we have both a "errorMessages" list and an
"errors" dict, when we combine those values later with join(), Python
raises a TypeError.

Transform each individual error message into a string, and then join()
the list of strings.

changelogs/fragments/707-jira-error-handling.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- jira - improve error message handling with multiple errors (https://github.com/ansible-collections/community.general/pull/707).

plugins/modules/web_infrastructure/jira.py

@@ -314,9 +314,9 @@ def request(url, user, passwd, timeout, data=None, method=None):
             msg = []
             for key in ('errorMessages', 'errors'):
                 if error.get(key):
-                    msg.append(error[key])
+                    msg.append(to_native(error[key]))
             if msg:
-                module.fail_json(msg=to_native(', '.join(msg)))
+                module.fail_json(msg=', '.join(msg))
             else:
                 module.fail_json(msg=to_native(error))
         else: