PlanDefinitionProcessor has a windows specific path

Describe the bug
PlanDefinitionProcessor persistBundle has this code:
File dir = new File("C:\src\GitHub\logs");
dir.mkdir();
it needs to be something like "separator + "rootDir" + "Github" + separator + "logs"

To Reproduce
Steps to reproduce the behavior:
run _refresh with the sever from the -fs command not running. If you are on a Mac it will create an exception.

Expected behavior
A clear and concise description of what you expected to happen.

Desktop (please complete the following information):

• OS: [e.g. Windows, Linux]
• Java Version [e.g. 8, 11]

Additional context
Add any other context about the problem here.