Rename bootstrap-os to bootstrap_os

Role names in ansible collections should not have hyphens.

roles/bootstrap_os/tasks/amzn.yml

@@ -0,0 +1,16 @@
+---
+- name: Enable selinux-ng repo for Amazon Linux for container-selinux
+  command: amazon-linux-extras enable selinux-ng
+
+- name: Enable EPEL repo for Amazon Linux
+  yum_repository:
+    name: epel
+    file: epel
+    description: Extra Packages for Enterprise Linux 7 - $basearch
+    baseurl: http://download.fedoraproject.org/pub/epel/7/$basearch
+    gpgcheck: true
+    gpgkey: http://download.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7
+    skip_if_unavailable: true
+    enabled: true
+    repo_gpgcheck: false
+  when: epel_enabled