Add gateway_ip to nets DB table

	- Add gateway_ip column to net table at DB
        - Save and retrive gw ip during net creation and vm launching process

Change-Id: I93c5339aa61ded3631d34a90018bd67525b49ab1
Signed-off-by: mirabal <leonardo.mirabal@altran.com>
diff --git a/openvimd.py b/openvimd.py
index 3affa56..17a958f 100755
--- a/openvimd.py
+++ b/openvimd.py
@@ -30,9 +30,9 @@
 
 __author__="Alfonso Tierno"
 __date__ ="$10-jul-2014 12:07:15$"
-__version__="0.5.3-r520"
+__version__="0.5.4-r521"
 version_date="Jan 2017"
-database_version="0.10"      #expected database schema version
+database_version="0.11"      #expected database schema version
 
 import httpserver
 import auxiliary_functions as af