[LDAP] Add test for LDAP\Connection ctor

Author: Ayesh

ext/ldap/tests/ldap_constructor.phpt

@@ -0,0 +1,14 @@
+--TEST--
+Attempt to instantiate an LDAP\Connection directly
+--EXTENSIONS--
+ldap
+--FILE--
+<?php
+
+try {
+    new LDAP\Connection();
+} catch (Error $ex) {
+    echo "Exception: ", $ex->getMessage(), "\n";
+}
+--EXPECT--
+Exception: Cannot directly construct LDAP\Connection, use ldap_create() instead