title: log4net date format defaulting to Iso8601DateFormatter despite specifying conversion pattern
body: <p>I need to format the date as Mar-07-2016 05:00:00 PM</p>
  
  <p>My web.config has the following entry</p>
  
  <pre><code>  &lt;parameter&gt;
      &lt;parameterName value="@date" /&gt;
      &lt;dbType value="DateTime" /&gt;
      &lt;layout type="log4net.Layout.PatternLayout"&gt;
        &lt;conversionPattern value="%date{MMM-dd-yyyy HH:mm:ss}" /&gt;
      &lt;/layout&gt;
    &lt;/parameter&gt;
  </code></pre>
  
  <p>But still the log shows this format: 2016-03-07 17:00:00.000 </p>