[#puppethack] use of mysql::db without mysql::server

This removes the hard dependencies on mysql::server from
manifests/db.pp. This permits one to use this module to manage databases
in an existing server, possibly located on a remote host (with a
properly configured /root/.my.cnf).

README.md

@@ -146,6 +146,21 @@ mysql::db { 'mydb':
 To add custom MySQL configuration, drop additional files into
 `includedir`. Dropping files into `includedir` allows you to override settings or add additional ones, which is helpful if you choose not to use `override_options` in `mysql::server`. The `includedir` location is by default set to /etc/mysql/conf.d.
 
+###Working with an existing server
+
+It is possible to use the MySQL module to instantiate databases and
+users on an existing MySQL server.  For this to work, you will need an
+appropriate `.my.cnf` in `root`'s home directory containing the remote
+server address and credentials.  For example:
+
+    [client]
+    user=root
+    host=localhost
+    password=secret
+
+When working with a remote server, you will *not* use the
+`mysql::server` class in your Puppet manifests.
+
 ##Reference
 
 ###Classes

manifests/db.pp

@@ -34,7 +34,7 @@ define mysql::db (
     charset  => $charset,
     collate  => $collate,
     provider => 'mysql',
-    require  => [ Class['mysql::server'], Class['mysql::client'] ],
+    require  => [ Class['mysql::client'] ],
   }
   ensure_resource('mysql_database', $dbname, $db_resource)
 
@@ -42,7 +42,6 @@ define mysql::db (
     ensure        => $ensure,
     password_hash => mysql_password($password),
     provider      => 'mysql',
-    require       => Class['mysql::server'],
   }
   ensure_resource('mysql_user', "${user}@${host}", $user_resource)
 
@@ -52,7 +51,10 @@ define mysql::db (
       provider   => 'mysql',
       user       => "${user}@${host}",
       table      => $table,
-      require    => [Mysql_database[$dbname], Mysql_user["${user}@${host}"], Class['mysql::server'] ],
+      require    => [
+        Mysql_database[$dbname],
+        Mysql_user["${user}@${host}"],
+      ],
     }
 
     $refresh = ! $enforce_sql