Fixed log handling and exceptions

Updated exceptions
	Added driver load exception
	Fixed logging override by removing previous log handlers
	Updated debug output to use gpu_id vs C-pointer
	Removed AmdSmiRetcode class in favor of using the wrapper
directly
	Added traceback limits for clean errors (Not in debug)

Change-Id: Ia02bb842b8f60d9ab4b68b7f8b1afda30b1c021c
Signed-off-by: Maisam Arif <maisarif@amd.com>

py-interface/__init__.py

@@ -194,4 +194,3 @@ from .amdsmi_exception import AmdSmiKeyException
 from .amdsmi_exception import AmdSmiBdfFormatException
 from .amdsmi_exception import AmdSmiTimeoutException
 from .amdsmi_exception import AmdSmiException
-from .amdsmi_exception import AmdSmiRetCode