Fixes bug where test modules with the phrase "init" were skipped

* Modified check for the name of files to skip from "init" (which is valid)
  to "__init__", which is what we specifically don't load. This was stopping
  tests that contained the phrase "init" to be skipped.

Change-Id: I1a4c53ddc6bc27f32b4d749cc6cd1ebbe54a9acf
Merge "Fixes bug where test modules with the phrase "init" were skipped"