move samba roles to roles directory

roles/role-samba4-primary-ad-dc/meta/main.yml

@@ -0,0 +1,18 @@
+galaxy_info:
+  author: L. Rutten
+  description: Install Samba4 Active Directory (Primary) Domain Controller
+  company: Bitfinity-NL
+  license: GPLv3
+  min_ansible_version: 2.4
+  platforms:
+  - name: Ubuntu
+    versions:
+    - xenial
+    - bionic
+  galaxy_tags:
+    - samba4
+    - AD
+    - Active Directory
+    - ubuntu
+    - Windows
+    - linux