Fix implicit dependencies

Make sure that all direct dependencies are listed in requirements.txt .

Change-Id: If99e774aab6944d3b0529edce94d9efbe73923a3
diff --git a/requirements.txt b/requirements.txt
index 17f694d..6a74e48 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,5 @@
 oslo.utils>=3.37.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
 gabbi>=2.7.0 # Apache-2.0
+requests>=2.14.2 # Apache-2.0
+testtools>=2.2.0 # MIT
diff --git a/telemetry_tempest_plugin/scenario/test_telemetry_integration.py b/telemetry_tempest_plugin/scenario/test_telemetry_integration.py
index 44a6dff..0f3e18b 100644
--- a/telemetry_tempest_plugin/scenario/test_telemetry_integration.py
+++ b/telemetry_tempest_plugin/scenario/test_telemetry_integration.py
@@ -11,9 +11,9 @@
 #    under the License.
 
 import os
-import requests
 import time
 
+import requests
 from tempest import config
 from tempest.lib.common.utils import data_utils
 from tempest.scenario import manager
diff --git a/telemetry_tempest_plugin/scenario/test_telemetry_integration_prometheus.py b/telemetry_tempest_plugin/scenario/test_telemetry_integration_prometheus.py
index 49ce5e8..6f9e3f6 100644
--- a/telemetry_tempest_plugin/scenario/test_telemetry_integration_prometheus.py
+++ b/telemetry_tempest_plugin/scenario/test_telemetry_integration_prometheus.py
@@ -11,9 +11,9 @@
 #    under the License.
 
 import os
-import requests
 import time
 
+import requests
 from tempest import config
 from tempest.lib.common.utils import data_utils
 from tempest.scenario import manager