Add new files: two tests, one common file, one program to set things up.

Change-Id: I4c9b7a937103f3978cbed6629ee4057018b80eae

More cleanup.  Also allow some tests to run even when TPM is already started.

Change-Id: I23558b96a1de55bbeca42dbf2e44f6802a0ec85b

Reorganize and standardize behavior of tests.

Change-Id: Id32fd09211a72deaa66a3dd0f973d35506ff96f2

TEST=ran all the tests I could run without TPM-free BIOS

Review URL:
20 files changed