Update Shibboleth and its tool chain to 3.0.4

The security problem was patched alreadyin 3.0.3p1, but all users are
recommended to update to the latest version at next service window.

Security: CVE-2019-9628

		https://shibboleth.net/community/advisories/secadv_20190311.txt

Release notes: https://wiki.shibboleth.net/confluence/display/SP3/ReleaseNotes