websites: dustinandtabitha: Switch to mod_md for cert

The _dustinandtabitha.com_ site now obtains its certificate from Let's
Encrypt using the Apache _mod_md_ (managed domain) module.  This
dramatically simplifies the deployment of this certificate, eliminating
the need for _cert-manager_ to obtain it, _cert-exporter_ to add it to
_certs.git_, and Jenkins to push it out to the web server.

certs/websites/dustinandtabitha.com.cer

@@ -1 +0,0 @@
-../lego/dustinandtabitha.com.crt

certs/websites/dustinandtabitha.com.key

@@ -1 +0,0 @@
-../lego/dustinandtabitha.com.key

roles/websites/dustinandtabitha.com/files/dustinandtabitha.httpd.conf

@@ -1,3 +1,5 @@
+MDomain dustinandtabitha.com
+
 <VirtualHost _default_:80>
 ServerName dustinandtabitha.com
 ServerAlias www.dustinandtabitha.com
@@ -11,8 +13,6 @@ ServerName dustinandtabitha.com
 ServerAlias www.dustinandtabitha.com
 
 Include conf.d/ssl.include
-SSLCertificateKeyFile /etc/pki/tls/private/dustinandtabitha.com.key
-SSLCertificateFile /etc/pki/tls/certs/dustinandtabitha.com.cer
 
 <IfModule mod_headers.c>
 	Header always set \

roles/websites/dustinandtabitha.com/meta/main.yml

@@ -1,9 +0,0 @@
-dependencies:
-- role: cert
-  vars:
-    cert_src: websites/dustinandtabitha.com.cer
-    cert_dest: /etc/pki/tls/certs/dustinandtabitha.com.cer
-    cert_key_src: websites/dustinandtabitha.com.key
-    cert_key_dest: /etc/pki/tls/private/dustinandtabitha.com.key
-  tags:
-  - websites/dustinandtabitha