[client-connection] add a sessionid property for dbapi compatibility
To ease transition from dbapi to repoapi we need the ClientConnection to be as
compatible as possible with the dbapi. Adding this method goes in this
direction.
It'll get deprecated in the deprecation wave that will conclude the repoapi
refactoring.
related to #2503918
<html>
<head>
<!-- dependencies -->
<script type="text/javascript">
var JSON_BASE_URL = '';
</script>
<script type="text/javascript" src="../../data/jquery.js"></script>
<script src="../../data/cubicweb.js" type="text/javascript"></script>
<script src="../../data/cubicweb.htmlhelpers.js" type="text/javascript"></script>
<script src="../../data/cubicweb.python.js" type="text/javascript"></script>
<script src="../../data/cubicweb.compat.js" type="text/javascript"></script>
<script src="../../data/cubicweb.ajax.js" type="text/javascript"></script>
<!-- qunit files -->
<script type="text/javascript" src="../../../devtools/data/qunit.js"></script>
<link rel="stylesheet" type="text/css" media="all" href="../../../devtools/data/qunit.css" />
<!-- test suite -->
<script src="cwmock.js" type="text/javascript"></script>
<script src="test_ajax.js" type="text/javascript"></script>
</head>
<body>
<div id="main"> </div>
<h1 id="qunit-header">cubicweb.ajax.js functions tests</h1>
<h2 id="qunit-banner"></h2>
<ol id="qunit-tests">
</body>
</html>