Move logging functionality from eutester.py to the machine class

[viglesiasce]

Currently there is an implementation in place in eutester that allows for logs to be gathered during the execution of a testcase. The implementation is simply a prototype and is hard coded in a way that does not expose the features full potential. In order to make the log capturing more flexible it should be implemented in the machine class and allow capturing an arbitrary file.

[viglesiasce]

Logging fucntionality has been moved but is untested at this point