Update _load_component's default exclude (#3252)
Update _load_component's default exclude (#3252)

* Since all of the paths and names that are processed by
  _load_components, set the default exclude to insights.*.tests. That way
  it only exlcudes insights core test files, and not every file that has
  test in it's name.
* Fixes #3250

Signed-off-by: Ryan Blakley <4a327043a305696607bd61d35aea19bf3b153200@redhat.com>
RedHatInsights/insights-core,RedHatInsights/insights-core