+ ansible 2+: change how to set the default user

Add a workaround in `dispansible` script for the default `become` user
as Ansible 2.x no longer supports environment variable loading into
variable `ansible_env`.

ansible/playbook.yml

@@ -3,8 +3,12 @@
     - mac_box
     - linux_box
 
-  sudo: yes
-  sudo_user: '{{ ansible_ssh_user }}'
+  gather_facts: yes
+
+  become: yes
+#  become_user: '{{ ansible_ssh_user }}'
+#  become_user: '{{ansible_env.USER}}'
+#  become_user: vagrant
 
   pre_tasks:
     # FIXME this check only works when no ansible tags are used!

dispansible

@@ -44,6 +44,7 @@ ansible-playbook\
  --extra-vars="@${DISPANSIBLE_SETTINGS_DIR}/private.yml"\
  --extra-vars="@${DISPANSIBLE_SETTINGS_DIR}/${OS}-software.yml"\
  --extra-vars="@${DISPANSIBLE_SETTINGS_DIR}/common-software.yml"\
+ --extra-vars=ansible_ssh_user=$USER \
  --inventory-file=inventories/$OS\
  --tags=$TAGS\
  playbook.yml