Add logging RPC caller

To help debug PSA API tests, a simple logging RPC caller has been
added that can be stacked on top of another rpc_caller to log
call requests and responses.  The logging_caller has been
integrated into the psa-api-test deployment.  Logging may
be enabled using '-l' command line switch.

Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: Ib71d9fb2d6efbd2b5f513dd62b47109aab7ef55d
7 files changed