test(e2e): Add return to sender app based test

Change-Id: Idb460369c4210a614dfba961efa3a8df8f5ee51a
Signed-off-by: E. Scott Daniels <daniels@research.att.com>
diff --git a/test/.gitignore b/test/.gitignore
index 62ea44b..affe489 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -3,4 +3,4 @@
 *.gcno
 *.gcda
 *.xml
-*test
+*.test