Check the existence of 'forceencap' parameter before use

Author: Boris Schrijver

systemvm/patches/debian/config/opt/cloud/bin/configure.py

@@ -520,6 +520,8 @@ def configure_ipsec(self, obj):
         file.addeq(" pfs=%s" % CsHelper.bool_to_yn(obj['dpd']))
         file.addeq(" keyingtries=2")
         file.addeq(" auto=start")
+        if not obj.has_key('encap'):
+            obj['encap']="false"
         file.addeq(" forceencaps=%s" % CsHelper.bool_to_yn(obj['encap']))
         if obj['dpd']:
             file.addeq("  dpddelay=30")