[saml common] rewrite session/identity dump loading and saving
[saml common] rewrite session/identity dump loading and saving

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