Improve plugin sanity (#966) (#984)

* callback_type -> type.

* Mark authors as unknown.

* Add author field forgotten in #627.

* Fix author entries.

* Add author field forgotten in #127.

* Fix some types.

(cherry picked from commit e5da25915d)

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/connection/chroot.py

@@ -9,7 +9,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 DOCUMENTATION = '''
-    author: Maykel Moya <mmoya@speedyrails.com>
+    author: Maykel Moya (!UNKNOWN) <mmoya@speedyrails.com>
     connection: chroot
     short_description: Interact with local chroot
     description:

plugins/connection/docker.py

@@ -11,8 +11,8 @@ __metaclass__ = type
 
 DOCUMENTATION = '''
     author:
-        - Lorin Hochestein
-        - Leendert Brouwer
+        - Lorin Hochestein (!UNKNOWN)
+        - Leendert Brouwer (!UNKNOWN)
     connection: docker
     short_description: Run tasks in docker containers
     description:

plugins/connection/iocage.py

@@ -9,7 +9,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 DOCUMENTATION = '''
-    author: Stephan Lohse <dev-github@ploek.org>
+    author: Stephan Lohse (!UNKNOWN) <dev-github@ploek.org>
     connection: iocage
     short_description: Run tasks in iocage jails
     description:

plugins/connection/lxc.py

@@ -6,7 +6,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 DOCUMENTATION = '''
-    author: Joerg Thalheim <joerg@higgsboson.tk>
+    author: Joerg Thalheim (!UNKNOWN) <joerg@higgsboson.tk>
     connection: lxc
     short_description: Run tasks in lxc containers via lxc python library
     description:

plugins/connection/lxd.py

@@ -6,7 +6,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 DOCUMENTATION = '''
-    author: Matt Clay <matt@mystile.com>
+    author: Matt Clay (@mattclay) <matt@mystile.com>
     connection: lxd
     short_description: Run tasks in lxc containers via lxc CLI
     description:

plugins/connection/oc.py

@@ -22,7 +22,7 @@ __metaclass__ = type
 
 DOCUMENTATION = '''
     author:
-        - xuxinkun
+        - xuxinkun (!UNKNOWN)
 
     connection: oc