- in preparation for replacing the EOL spring saml extension lib
with spring security core saml, adding more test coverage on
the SAML SP metadata
- tests that SAML SP metadata matches the UAA configs (in the
context of this test, the UAA configs are from the local uaa.yml
used to start a local server)
- also explicitly declare some SAML-SP-related fields in the said
local uaa.yml to make the inputs to the test clearer

[#186986697]

- Replaced the code that was depending on the platform where the test was being executed.

[#186986697]

Co-authored-by: Danny Faught <danny.faught@broadcom.com>

Co-authored-by: Hongchol Sinn <hongchol.sinn@broadcom.com>

* Looks like we used the wrong metadata when we added this assertion.