add per file ignores

Signed-off-by: Chris Snow <[email protected]>

Author: snowch

.travis.yml

@@ -45,7 +45,7 @@ jobs:
       name: "Flake8 code checks"
       python: 3.8
       install:
-        - pip3 install flake8 flake8-docstrings
+        - pip3 install flake8 flake8-docstrings flake8-per-file-ignores
       script:
         - flake8 --docstring-convention numpy bin/ hpecp/ tests/
     - stage: format