Let vault lookup output unicode string. (#73571)

Until now, the lookup plugin returned a byte string.
Changed this to output a unicode string instead.

changelogs/fragments/73456-let-vault-lookup-output-string.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - the unvault lookup plugin returned a byte string. Now returns a real string.

lib/ansible/plugins/lookup/unvault.py

@@ -56,7 +56,7 @@ class LookupModule(LookupBase):
                 actual_file = self._loader.get_real_file(lookupfile, decrypt=True)
                 with open(actual_file, 'rb') as f:
                     b_contents = f.read()
-                ret.append(b_contents)
+                ret.append(to_text(b_contents))
             else:
                 raise AnsibleParserError('Unable to find file matching "%s" ' % term)
 

test/integration/targets/unvault/aliases

@@ -0,0 +1 @@
+shippable/posix/group2

test/integration/targets/unvault/main.yml

@@ -0,0 +1,9 @@
+- hosts: localhost
+  tasks:
+    - set_fact:
+        unvaulted: "{{ lookup('unvault', 'vault') }}"
+    - debug:
+        msg: "{{ unvaulted }}"
+    - assert:
+        that:
+            - "unvaulted == 'foo: bar\n'"

test/integration/targets/unvault/password

@@ -0,0 +1 @@
+secret

test/integration/targets/unvault/runme.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -eux
+
+
+ansible-playbook --vault-password-file password main.yml

test/integration/targets/unvault/vault

@@ -0,0 +1,6 @@
+$ANSIBLE_VAULT;1.1;AES256
+33386337343963393533343039333563323733646137636162346266643134323539396237646333
+3663363965336335663161656236616532346363303832310a393264356663393330346137613239
+34633765333936633466353932663166343531616230326161383365323966386434366431353839
+3838623233373231340a303166666433613439303464393661363365643765666137393137653138
+3631