allow retry in test

Author: BarDweller

client/src/test/java/dev/snowdrop/buildpack/docker/ImageUtilsTest.java

@@ -7,6 +7,7 @@
 import static org.mockito.Mockito.when;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.lenient;
+import static org.mockito.Mockito.atLeast;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -79,7 +80,7 @@ void testPullImageSingleUnknown(@Mock DockerConfig config,
 
     ImageUtils.pullImages(config, imageName);
 
-    verify(pic).exec(ArgumentMatchers.any());
+    verify(pic, atLeast(1)).exec(ArgumentMatchers.any());
   }
 
   @Test