CP-300 Fixed: path separator problem that causing systemjs fail to import source and test files properly on windows.

[ahmedshuhel]

Here is the issue that describes the problem.

[maxwellpeterson-wf]

+10 works as expected in a number of projects. Ready for merge @charliekump-wf and 1.1.2 patch release

[charliekump-wf]

QA Resource Approval: +1

• [x] Reviewed by dev
• [x] All unit tests pass

Merging into master.