tests: create a conftest for integration tests that setup env vars automatically
tests: create a conftest for integration tests that setup env vars automatically

Signed-off-by: Alfredo Deza <3f4d00ffa77e6441ab2d23c25a618925d2383b02@anchore.com>

anchore/anchore-engine,anchore/anchore-engine,anchore/anchore-engine