title: Jira API updates with Jira-Python with no notification
body: <p>Didn't find a <a href="https://stackoverflow.com/search?q=%5Bjira%5D%20python%20api%20notify%3DFalse%20%22Duplicate%20Issue">Duplicate Issue</a> for this and the notifiyUsers = False parameter was added in September 2016.</p>
  
  <p>Docs:<br>
  <a href="https://jira.atlassian.com/browse/JRA-34423" rel="nofollow noreferrer">https://jira.atlassian.com/browse/JRA-34423</a><br>
  <a href="http://jira.readthedocs.io/en/master/examples.html" rel="nofollow noreferrer">http://jira.readthedocs.io/en/master/examples.html</a> </p>
  
  <p>I need to add labels to about 1700 tickets in our system. Sending out notification emails for that many tickets at once would be... politically unfavorable. </p>
  
  <p>I can update the labels using the jira-python library, but when I set notify=False it returns an error.
  Working Code:</p>
  
  <pre><code>from jira import JIRA
  host = "http://&lt;site&gt;.atlassian.net"
  jira = JIRA(host,basic_auth=(&lt;user&gt;, &lt;password&gt;))
  issue = jira.issue('ABC-1234')
  issue.fields.labels.append(u'New_Label')
  issue.update(fields={"labels": issue.fields.labels})
  </code></pre>
  
  <p>Changing the last line to:</p>
  
  <pre><code>issue.update(notify=False, fields={"labels": issue.fields.labels})
  </code></pre>
  
  <p>Results in error:</p>
  
  <pre><code>JIRAError: JiraError HTTP 400 url:
  </code></pre>
  
  <p>Python 3.5.2<br>
  Jupyter Notebook<br>
  Updated the Jira library using pip this morning<br>
  Jira Cloud version 1000.844.1  </p>