Changed salt-pepper version to also accept bigger versions than 0.5.2

Change-Id: I461afc20a7f21d4559639e30c29369aa78dddedc
diff --git a/src/com/mirantis/mk/Python.groovy b/src/com/mirantis/mk/Python.groovy
index 0919904..8a2cdf8 100644
--- a/src/com/mirantis/mk/Python.groovy
+++ b/src/com/mirantis/mk/Python.groovy
@@ -311,7 +311,7 @@
     def common = new com.mirantis.mk.Common()
 
     // virtualenv setup
-    requirements = ['salt-pepper==0.5.2']
+    requirements = ['salt-pepper==0.5.*']
     setupVirtualenv(path, 'python2', requirements, null, clean, true)
 
     // pepperrc creation