More fixes for unicode handling in the connection plugins.

Tested that ssh, docker, local, lxc-libvirt, chroot all work with the
updated unicode integration test.

test/integration/unicode.yml

@@ -93,6 +93,36 @@
         that:
           - "'Zażółć' in results.stdout_lines"
 
+    - name: Clean a temp directory
+      file:
+        path: /var/tmp/ansible_test_unicode_get_put
+        state: absent
+
+    - name: Create a temp directory
+      file:
+        path: /var/tmp/ansible_test_unicode_get_put
+        state: directory
+
+    - name: Create a file with a non-ascii filename
+      file:
+        path: /var/tmp/ansible_test_unicode_get_put/Zażółć
+        state: touch
+      delegate_to: localhost
+
+    - name: Put with unicode filename
+      copy:
+        src: /var/tmp/ansible_test_unicode_get_put/Zażółć
+        dest: /var/tmp/ansible_test_unicode_get_put/Zażółć2
+
+    - name: Fetch with unicode filename
+      fetch:
+        src: /var/tmp/ansible_test_unicode_get_put/Zażółć2
+        dest: /var/tmp/ansible_test_unicode_get_put/
+
+    - name: Clean a temp directory
+      file:
+        path: /var/tmp/ansible_test_unicode_get_put
+        state: absent
 
 - name: 'A play for hosts in group: ĪīĬĭ'
   hosts: 'ĪīĬĭ'