[idp saml2] restore normal behaviour when idp_slo fails
[idp saml2] restore normal behaviour when idp_slo fails

incuna/authentic,pu239ppy/authentic2,BryceLohr/authentic,incuna/authentic,adieu/authentic2,pu239ppy/authentic2,pu239ppy/authentic2,incuna/authentic,incuna/authentic,adieu/authentic2,BryceLohr/authentic,adieu/authentic2,pu239ppy/authentic2,adieu/authentic2,BryceLohr/authentic,BryceLohr/authentic,incuna/authentic