sync oslo to current

this is largely to deal with config generator issues, however
we're apparently quite far behind on other items, so lets just
sync it all.

Change-Id: I2f36e41b5d7cce8dd0b64636e45da3f7481b0e39
diff --git a/tools/config/generate_sample.sh b/tools/config/generate_sample.sh
index b86e0c2..607fecb 100755
--- a/tools/config/generate_sample.sh
+++ b/tools/config/generate_sample.sh
@@ -91,3 +91,9 @@
 MODULEPATH=${MODULEPATH:-$DEFAULT_MODULEPATH}
 OUTPUTFILE=$OUTPUTDIR/$PACKAGENAME.conf.sample
 python -m $MODULEPATH $FILES > $OUTPUTFILE
+
+# Hook to allow projects to append custom config file snippets
+CONCAT_FILES=$(ls $BASEDIR/tools/config/*.conf.sample 2>/dev/null)
+for CONCAT_FILE in $CONCAT_FILES; do
+    cat $CONCAT_FILE >> $OUTPUTFILE
+done