GUI-836: Prevent 404 error when updating a security group that has a deleted security group in one of its rules.  Wrap calls to update_rules and update_tags in standard error handler to display errors from API calls.
Merge branch 'develop' into GUI-836
Merge pull request #648 from eucalyptus/GUI-836

GUI-836: Prevent 404 error when updating a security group that has a deleted security group in one of its rules