Added Build-Depends to stdeb.cfg to fix warnings

Change-Id: Ie1201f1d0c1853852a08ce3fb16131777b2d1f7c
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/stdeb.cfg b/stdeb.cfg
index 7d0b3d7..b385524 100644
--- a/stdeb.cfg
+++ b/stdeb.cfg
@@ -1,2 +1,3 @@
 [DEFAULT]
+Build-Depends: dh-python
 Depends: python-setuptools, python-pycurl, python-click, python-prettytable, python-yaml