Updated from global requirements

Change-Id: I48b3e178bf6741231cb5fafd8579265a2c0d2739
diff --git a/test-requirements.txt b/test-requirements.txt
index 7115168..8fcf071 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,4 +10,4 @@
 mock>=1.1;python_version!='2.6'
 mock==1.0.1;python_version=='2.6'
 coverage>=3.6
-oslotest>=1.5.1 # Apache-2.0
+oslotest>=1.7.0 # Apache-2.0