fixes 88: Change openvimd.cfg to listen in all interfaces by default

Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/openvimd.cfg b/openvimd.cfg
index ccc888f..74345f5 100644
--- a/openvimd.cfg
+++ b/openvimd.cfg
@@ -56,7 +56,7 @@
 http_admin_port: 9085                # Admin port where openvim is listening (when missing, no administration server is launched)
 
 #database parameters
-db_host:   localhost                 # by default localhost
+db_host:   0.0.0.0                   # by default localhost
 db_user:   vim                       # DB user
 db_passwd: vimpw                     # DB password
 db_name:   vim_db                    # Name of the VIM DB