Add tool-info module for TracerX-Del and TracerX-WP

[ArpitaDutta]

This pull request adds support for the TracerX tool with two different interpolation methods.

[PhilippWendler]

It seems that TracerX-WP is the same tool as TracerX-Del except for the executable, is it (same URL etc.)? In this case, the tool-info module should not be duplicated, because duplicated code is always a maintenance burden. If you need a separate tool-info module, please use inheritance to avoid redundant code.

Maybe you even want to avoid this at all and simply make TracerX-WP be executable in the same as with tracerx?

[ArpitaDutta]

May I request you accept this merge request as it is as the file modification using inheritance does not seem to be straightforward right now?

[PhilippWendler]

To me it looks like this would be pretty straightforward actually, more than for other cases where we already have tool-info modules that use inheritance. Just let the class in tracerx-wp.py inherit from the one in tracerx.py and overwrite the two methods.

[ArpitaDutta]

I am just worrying that the class name in tracerx-wp.py is as same as in tracerx.py.

If I change the class name in tracerx-wp.py to inherit properties from tracerx.py it may create some side effects in other steps of execution.

[PhilippWendler]

No, there is no problem here. Lots of existing tool-info modules do exactly this. Have a look at graves.py and cpachecker.py, for example.

[ArpitaDutta]

I have updated the PR as suggested.