More unit test for the syscall tracer

Signed-off-by: Luca Clementi <luca.clementi@gmail.com>
Removed old error message

These errors were used with the old syscalltracer (based on
ptrace-python) so are not needed anymore

Signed-off-by: Luca Clementi <luca.clementi@gmail.com>
replacing unmet dependencies with newly discovered through dynamic tracing

Signed-off-by: Luca Clementi <luca.clementi@gmail.com>