Add Helm Chart linting

[potiuk]

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[potiuk]

cc: @jaketf @mik-laj

[kaxil]

hmm the CI is stuck

[potiuk]

Seems like we do experience some smaller job queue or smth like that. I might have to speed up my "selective tests work".

[potiuk]

Looks awfully like some of the Travis problems we had.

[kaxil]

Looks awfully like some of the Travis problems we had.

:( yeah

[turbaszek]

This looks like a flaky / side effect?

______________________ TestConf.test_conf_as_dict_source _______________________
1164

1165
self = <tests.test_configuration.TestConf testMethod=test_conf_as_dict_source>
1166

1167
    def test_conf_as_dict_source(self):
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        # test display_source
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        cfg_dict = conf.as_dict(display_source=True)
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>       self.assertEqual(
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            cfg_dict['core']['load_examples'][1], 'airflow.cfg')
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E       AssertionError: 'env var' != 'airflow.cfg'
1173
E       - env var
1174
E       + airflow.cfg

[kaxil]

This looks like a flaky / side effect?

______________________ TestConf.test_conf_as_dict_source _______________________
1164

1165
self = <tests.test_configuration.TestConf testMethod=test_conf_as_dict_source>
1166

1167
    def test_conf_as_dict_source(self):
1168
        # test display_source
1169
        cfg_dict = conf.as_dict(display_source=True)
1170
>       self.assertEqual(
1171
            cfg_dict['core']['load_examples'][1], 'airflow.cfg')
1172
E       AssertionError: 'env var' != 'airflow.cfg'
1173
E       - env var
1174
E       + airflow.cfg

This is fixed in master