Add sample test fragment and list.

actions/first.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+cat "Hello from gCube Actions" > new_file.txt
+git add new_file.txt
+git commit -m "Add new_file.txt from gCube Actions"

repos/default_list.txt

@@ -0,0 +1,3 @@
+to_update_1
+to_update_2
+to_update_3