Fix Java-dependent test for release

Change-Id: I6baf5cd96fec7fc91b317b7e8162b4414852ee2b
diff --git a/.gitignore b/.gitignore
index e741c16..4b3dd5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 blib
 MYMETA*
 Makefile
+Dockerfile
 pm_to_blib
 \#*
 *~