Update "type" in ServerDescription and tests

Author: tanlisu

src/MongoDB/ServerDescription.c

@@ -202,7 +202,7 @@ HashTable* php_phongo_serverdescription_get_properties_hash(phongo_compat_object
 		ZVAL_LONG(&port, host_list->port);
 		zend_hash_str_update(props, "port", sizeof("port") - 1, &port);
 
-		ZVAL_LONG(&type, php_phongo_server_description_type(intern->server_description));
+		ZVAL_STRING(&type, mongoc_server_description_type(intern->server_description));
 		zend_hash_str_update(props, "type", sizeof("type") - 1, &type);
 	}
 

tests/server/server-getServerDescription-001.phpt

@@ -21,7 +21,7 @@ object(MongoDB\Driver\ServerDescription)#%d (%d) {
   ["port"]=>
   int(%d)
   ["type"]=>
-  int(%d)
+  string(%d) "%r(Standalone|Mongos|RSPrimary)%r"
   ["hello_response"]=>
   array(%d) {
     %a

tests/serverDescription/serverDescription-debug-001.phpt

@@ -22,7 +22,7 @@ object(MongoDB\Driver\ServerDescription)#%d (%d) {
   ["port"]=>
   int(%d)
   ["type"]=>
-  int(%d)
+  string(%d) "%r(Standalone|Mongos|RSPrimary)%r"
   ["hello_response"]=>
   array(%d) {
     %a

tests/serverDescription/serverDescription-getType-001.phpt

@@ -17,11 +17,11 @@ $manager = create_test_manager();
 $server = $manager->selectServer(new MongoDB\Driver\ReadPreference('primary'));
 $type = $server->getServerDescription()->getType();
 
-var_dump(in_array($type, $expected_types));
+var_dump($type);
 
 ?>
 ===DONE===
 <?php exit(0); ?>
---EXPECT--
-bool(true)
+--EXPECTF--
+string(%d) "%r(Standalone|Mongos|RSPrimary)%r"
 ===DONE===

tests/serverDescription/serverDescription-var_export-001.phpt

@@ -20,7 +20,7 @@ echo var_export($server->getServerDescription(), true), "\n";
 MongoDB\Driver\ServerDescription::__set_state(array(
    'host' => '%s',
    'port' => %d,
-   'type' => %d,
+   'type' => '%r(Standalone|Mongos|RSPrimary)%r',
    'hello_response' => 
   array (
     %a