Setup local mutual attestation between the data-enclave and the authorization-enclave

[longtomjr]

Depends on: #33

There are several potential ways to go about this.

1. Use the SGX local attestation 2.0. See:
   • page 98 of the Intel SGX Dev Reference
   • The attestation section of sgx101
2. Use the DCAP attestation process to generate and verify the quote.
   • The benefit to using this if possible is that our attestation code will be shared between local and remote attestation
   • This will only make sense if we can verify a quote from an enclave without having to go through Azure Attestation