MINIFICPP-1371 - Increase output dir check timeout

Signed-off-by: Arpad Boda <aboda@apache.org>

This closes #909
diff --git a/docker/test/integration/minifi/test/__init__.py b/docker/test/integration/minifi/test/__init__.py
index fd0466c..4a888ae 100644
--- a/docker/test/integration/minifi/test/__init__.py
+++ b/docker/test/integration/minifi/test/__init__.py
@@ -186,7 +186,7 @@
             stats = container.stats(stream=False)
             logging.info('Container stats:\n%s', stats)
 
-    def check_output(self, timeout=5, subdir=''):
+    def check_output(self, timeout=10, subdir=''):
         """
         Wait for flow output, validate it, and log minifi output.
         """