Fixed flake8 error

Author: shlao

insights/specs/datasources/host_key_files.py

@@ -7,11 +7,12 @@
 from insights.core.context import HostContext
 from insights.core.exceptions import SkipComponent
 from insights.core.plugins import datasource
-from insights.core.spec_factory import DatasourceProvider 
+from insights.core.spec_factory import DatasourceProvider
 
 ERROR_KEY = "error: Could not load host key:"
 VAR_LOG_MSG = '/var/log/messages'
 
+
 @datasource(HostContext)
 def host_key_files(broker):
     """

insights/tests/datasources/test_host_key_files.py

@@ -1,4 +1,3 @@
-import pytest
 from mock.mock import patch, mock_open
 from insights.core.spec_factory import DatasourceProvider
 from insights.specs.datasources.host_key_files import host_key_files
@@ -14,6 +13,7 @@
 /etc/ssh_host_dsa_key   0
 """.strip()
 
+
 @patch(
     'insights.specs.datasources.host_key_files.open', new_callable=mock_open, read_data=VAR_LOGS.splitlines()
 )