Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I83c844373ea41d762367085cb16b01d31676e33d
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/src/test/yaml/callbackgentest/two.yaml b/src/test/yaml/callbackgentest/two.yaml
index 1f61e3b..f7f1d8f 100644
--- a/src/test/yaml/callbackgentest/two.yaml
+++ b/src/test/yaml/callbackgentest/two.yaml
@@ -1,4 +1,4 @@
-# Validate the same callback name works in differnt config files.
+# Validate the same callback name works in different config files.
 
 - name: test path group 1
   class: group