fix gnocchi unprocessed measures debug

gate uses gnocchi redis driver so there is no 'measures' folder
anymore. we should dump redis keys related to incoming storage and
the number of unprocessed 'objects'

Change-Id: I639a5b118c96728a8454680bfb33bd057934a534
diff --git a/ceilometer/tests/integration/hooks/post_test_hook.sh b/ceilometer/tests/integration/hooks/post_test_hook.sh
index 051b4d8..cd211d3 100755
--- a/ceilometer/tests/integration/hooks/post_test_hook.sh
+++ b/ceilometer/tests/integration/hooks/post_test_hook.sh
@@ -61,7 +61,7 @@
     # Be sure to source Gnocchi settings before
     source $BASE/new/gnocchi/devstack/settings
     echo "* Unprocessed measures:"
-    sudo find $GNOCCHI_DATA_DIR/measure
+    for key in $(redis-cli --scan --pattern 'incoming*'); do echo -n $key && redis-cli llen $key; done
 
     set -x
 }