Device attestation does not work with newest tpm2_tools

[simon-pau]

The tpm2 tools commands used for the device attestation article do not work with the newest versions:
https://tpm2-software.github.io/2020/06/12/Remote-Attestation-With-tpm2-tools.html#attestation-goals

[idesai]

@simon-pau specifically what errors do you see and with what version of the tools?