Fix htpasswd creation for registry

We were using the wrong filename and encryption type.

Change-Id: I48d2a7288e5cd52e57f5632fee17f677429a1a9c

playbooks/roles/registry/tasks/main.yaml

@@ -14,11 +14,13 @@
   package:
     name:
       - python3-passlib
+      - python3-bcrypt
     state: present
 - name: Write htpassword file
   htpasswd:
     create: true
-    path: /var/registry/auth/htpassword
+    crypt_scheme: bcrypt
+    path: /var/registry/auth/htpasswd
     name: "{{ registry_user }}"
     password: "{{ registry_password }}"
 - name: Write TLS private key