Release cycle test template file cleanup

Change-Id: I3a56b537a8b96567fbef002c5b4ab3f42dcb96ba
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

roles/copy-release-tools-scripts/files/release-tools/add_master_python3_jobs.sh

@@ -57,7 +57,13 @@ done
 changes=$(git diff-index --name-only HEAD --)
 if [ -n "$changes" ]; then
     git checkout -b add-${SERIES}-python-jobtemplates
-    git add .
+
+    # Add only the files we modified
+    for file in $changes; do
+        git add $file
+    done
+    git clean -f
+
     git diff --cached
     git commit -m "$commit_msg"
     git show