Rust agent test fix:

[galmasi]

• The current test harness edits the keylime agent source code to adjust the location of the boot log.
• The location of the default value for the boot log has migrated from common.rs to config.rs
• Adding config.rs to the list of locations examined for replacement of boot log location.

/sys/kernel/security/tpm0/binary_bios_measurements -> /var/tmp/binary_bios_measurements

TODO: the rust agent has a testing feature for this; changing source code is considered unnecessary and harmful. Fix later.

[galmasi]

Merging this feature should result in keylime/rust-keylime#665 passing packit tests (or at least improve passing score).

[ansasaki]

@galmasi I created #499 addressing the issue, could you please review?

[galmasi]

Superseded by #499.