Fix typos in mysql::server::monitor class

* fix the dependency declaration

+ add basic tests

manifests/server/monitor.pp

@@ -4,7 +4,7 @@ class mysql::server::monitor (
   $mysql_monitor_hostname
 ) {
 
-  class ['mysql::server'] -> class['mysql::monitor']
+  Class['mysql::server'] -> Class['mysql::server::monitor']
 
   database_user{ "${mysql_monitor_username}@${mysql_monitor_hostname}":
     password_hash => mysql_password($mysql_monitor_password),

spec/classes/mysql_server_monitor_spec.rb

@@ -0,0 +1,18 @@
+require 'spec_helper'
+describe 'mysql::server::monitor' do
+  let :facts do
+    { :osfamily => 'Debian' }
+  end
+  let :pre_condition do
+    "include 'mysql::server'"
+  end
+  let :params do
+    {
+      :mysql_monitor_username => 'monitoruser',
+      :mysql_monitor_password => 'monitorpass',
+      :mysql_monitor_hostname => 'monitorhost'
+    }
+  end
+
+  it { should contain_database_user("monitoruser@monitorhost")}
+end