[ansible] fix deprecations

ansible/ansible.cfg

@@ -1,4 +1,4 @@
 [defaults]
-hostfile = hosts.private
+inventory = hosts.private
 retry_files_enabled = False
 pipelining = True

ansible/roles/osx/tasks/main.yml

@@ -1,5 +1,5 @@
-- include: dock.yml
-- include: terminal.yml
+- import_tasks: dock.yml
+- import_tasks: terminal.yml
 
 - name: set OS X defaults
   my_defaults:

ansible/roles/server/tasks/main.yml

@@ -20,4 +20,4 @@
     path: ~/.config/systemd/user
     state: directory
 
-- include: znc.yml
+- import_tasks: znc.yml