Update Swank Metadata

In this line:

<SPSSODescriptor ID="_d9594ebb-a81d-440f-aaea-0d887efdf0c3" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" AuthnRequestsSigned="true" WantAssertionsSigned="false">

We need to have AuthnRequestsSigned="false" instead