Bad course import tests failing on Firefox 57

Description

Reference for Bok Choy upgrade process: https://openedx.atlassian.net/wiki/spaces/TE/pages/567083109/Firefox+57+upgrade+for+Bok+Choy+tests

Description: As part of the Firefox upgrade on Jenkins, the following tests are failing, and need to be fixed

Error Msg:

Stacktrace

Link to failing build: https://build.testeng.edx.org/job/edx-platform-test-subset/1100583/

Tests Impacted:

acceptance.tests.studio.test_import_export.TestEntranceExamCourseImport.test_bad_filename_error
acceptance.tests.studio.test_import_export.TestEntranceExamCourseImport.test_bad_import
acceptance.tests.studio.test_import_export.TestCourseImport.test_bad_filename_error
acceptance.tests.studio.test_import_export.TestCourseImport.test_bad_import
acceptance.tests.studio.test_import_export.TestLibraryImport.test_bad_filename_error
acceptance.tests.studio.test_import_export.TestLibraryImport.test_bad_import

Steps to Reproduce

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Current Behavior

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Expected Behavior

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Reason for Variance

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Release Notes

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User Impact Summary

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Assignee

Stuart Young

Reporter

Stuart Young

Reach

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Impact

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Platform Area

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Customer

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Partner Manager

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Contributor Name

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Groups with Read-Only Access

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Actual Points

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Category of Work

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Platform Map Area (Levels 1 & 2)

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Platform Map Area (Levels 3 & 4)

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Sprint

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Priority

CAT-3
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