sprint_call_stack/sprint_executing improve method output
sprint_call_stack/sprint_executing improve method output

- Qualify method name with class name.
- Change self argument to print as "self = <self>".
- Add code to print args and kwargs.

Change-Id: I4b2734399fce6abffb19af1eae21483cb49bb9e9
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation