Incorporation of EnrollmentID into TCerts

[dulcep]

Currently TCert structure does not include “EnrollmentID”. Encrypted EnrollmentID need to be added to the TCert. They are encrypted to support privacy and un-linkability.

[binhn]

@diegomasini Let's separate out the encryption of the attributes into another issue. We need the attributes in first.

[diegomasini]

@binhn ok, that sounds good, we will do that.