Retry once when disabling fail points (#1445)

The previous refactor in 90dcf18 changed when we disable fail points. ManagesFailPointTrait now does so immediately after test operations are run instead of during tear down, so we may be hitting a point where the server stream was disconnected and libmongoc is not recovering (possibly related to CDRIVER-4532). Adding an extra retry attempt seems to overcome this.

Author: jmikola

Diff for: tests/UnifiedSpecTests/ManagesFailPointsTrait.php

@@ -2,6 +2,7 @@
 
 namespace MongoDB\Tests\UnifiedSpecTests;
 
+use MongoDB\Driver\Exception\ConnectionException;
 use MongoDB\Driver\Server;
 use MongoDB\Operation\DatabaseCommand;
 use stdClass;
@@ -31,8 +32,14 @@ public function configureFailPoint(stdClass $failPoint, Server $server): void
     public function disableFailPoints(): void
     {
         foreach ($this->failPointsAndServers as [$failPoint, $server]) {
-            $operation = new DatabaseCommand('admin', ['configureFailPoint' => $failPoint, 'mode' => 'off']);
-            $operation->execute($server);
+            try {
+                $operation = new DatabaseCommand('admin', ['configureFailPoint' => $failPoint, 'mode' => 'off']);
+                $operation->execute($server);
+            } catch (ConnectionException $e) {
+                // Retry once in case the connection was dropped by the last operation
+                $operation = new DatabaseCommand('admin', ['configureFailPoint' => $failPoint, 'mode' => 'off']);
+                $operation->execute($server);
+            }
         }
 
         $this->failPointsAndServers = [];