Test Explorer contains an unrelated/unnecessary node at the top of the hierarchy.

[d3r3kk]

Environment data

• VS Code version: 1.31.1
• Extension version (available under the Extensions sidebar): 2019.2.5433
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.0
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
• Relevant/affected Python packages and their versions: pytest

Expected behaviour

All nodes displayed in the Test Explorer hierarchy are nodes that pertain to a specific folder, file, test suite, or test function.

Actual behaviour

A node that has no relevance to the user's workspace test contents appears at the top of the tests hierarchy in the Test Explorer:

Steps to reproduce:

1. Clone, open, and configure Python/pytest, the Pytest repo in VS Code with the Python extension installed.
   • Once the VS Code editor and the Python extension load, the Test Explorer beaker icon should appear in the activity bar.
2. Run all tests.
3. Inspect the test results in the Test Explorer tree.

[DonJayamanne]

New code written in #4033 should solve this issue.
@ericsnowcurrently @d3r3kk /cc