added test for first_available and copy

test/integration/roles/test_copy/tasks/main.yml

@@ -250,3 +250,9 @@
   assert:
     that:
     - replace_follow_result.checksum == target_file_result.stdout
+
+- name: test first avialable file
+  copy: dest={{output_dir}}/faf_test
+  first_available_file: 
+        - doesntexist.txt
+        - foo.txt