Force OpenBSD's pkg to run non-interactively.

tasks/openbsd_bootstrap.yml

@@ -2,7 +2,7 @@
 # Bootstrap an OpenBSD machine to be able to run Ansible on it.
 
 - name: Install Python
-  raw: "PKG_PATH={{ openbsd_pkg_mirror }}/OpenBSD/$(uname -r)/packages/$(arch -s)/ /usr/sbin/pkg_add py-pip"
+  raw: "PKG_PATH={{ openbsd_pkg_mirror }}/OpenBSD/$(uname -r)/packages/$(arch -s)/ /usr/sbin/pkg_add -I py-pip"
   register: openbsd_pkg_add_python
   changed_when: "'python' in openbsd_pkg_add_python.stdout"