Add install_requires to setup.py

Change-Id: I31430a356934fa421d43fc2a191cc190ef032e39
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/MANIFEST.in b/MANIFEST.in
index e8fc479..503547f 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -17,5 +17,6 @@
 ##
 
 include README.rst
+include requirements.txt
 recursive-include osm_common *.py *.xml *.sh *.txt
-recursive-include devops-stages *
\ No newline at end of file
+recursive-include devops-stages *