DPE: Add complex command sequence test

Add test to verify if CertifyKey has no impact on the internal
certificates and derivations by previous GetCertificateChain command.

Signed-off-by: Maulik Patel <maulik.patel@arm.com>
Change-Id: Id6022ac51741a9202773e0f654e047d10aa60b9f
9 files changed