Root certificate and signing certificates

- Add method to generate a Root Certificate (allowing a chain of 1)
- Add method to sign a provided "certificate" - Really if provided with
  a public key, generate a chain of a new certificate signed with the
  Root certificate
- Changed certificate dates from -30 days and +10 years from day it was
- Changed email in certificate

Change-Id: I405417d0b3c495d8bda83d4ca21a803c4667bbb6
2 files changed
tree: 53b1bc4cfe79bb8e28482f29a9b854dde3770997
  2. cpp/
  3. java/
  4. proto/