added testfile with multiple requests

Author: jens1205

tests/external_file/multpile_requests.http

@@ -0,0 +1,20 @@
+POST https://reqres.in/api/users
+Content-Type: application/json
+
+{
+    "name": "morpheus",
+    "job": "leader",
+    "array": ["a", "b", "c"],
+    "object_ugly_closing": {
+      "some_key": "some_value"
+}
+}
+
+POST https://reqres.in/api/users
+Content-Type: application/json
+
+< ./user.json
+
+####
+
+GET https://reqres.in/api/users?page=5