Introduce CONTACT_EMAIL setting

applications can use the setting as to point users in which email
address they should get in contact for support.

snf-common/conf/00-snf-common-admins.conf

@@ -25,3 +25,6 @@
 #
 ## Address to use for outgoing emails
 #DEFAULT_FROM_EMAIL = "~okeanos <no-reply@grnet.gr>"
+#
+# Email where users can contact for support
+#CONTACT_EMAIL = "support@synnefo.org"

snf-common/synnefo/settings/default/admins.py

@@ -25,3 +25,6 @@ DEFAULT_CHARSET = 'utf-8'
 
 # Address to use for outgoing emails
 DEFAULT_FROM_EMAIL = "~okeanos <no-reply@grnet.gr>"
+
+# Email where users can contact for support
+CONTACT_EMAIL = "support@synnefo.org"