Auto merge of #3108 - micbou:codecov-tests, r=puremourning

[READY] Ignore tests in codecov configuration

I don't know why but codecov includes the `tests` folder in its coverage report since [we migrated to Python 3.7 on AppVeyor](2d213e7ed2). Ignoring the folder in codecov configuration file like [we already do in the ycmd repository](ea58cfcf50/codecov.yml (L16-L25)) fixes the issue.

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codecov.yml

@@ -13,6 +13,10 @@ coverage:
     patch: true
     changes: true
 
+  # We don't want statistics for the tests themselves.
+  ignore:
+  - .*/tests/.*
+
 comment:
   layout: "header, diff, changes, uncovered"
   behavior: default  # update if exists else create new