fix: Test failing for theme name change

[nayan-rafiq]

Description

Fixes a failing junit test due to theme name change.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• JUnit test

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[vercel]

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Name	Status	Preview	Updated
appsmith	✅ Ready (Inspect)	Visit Preview	May 9, 2022 at 6:02AM (UTC)

[nayan-rafiq]

/ok-to-test sha=db1c8f6

[github-actions]

Tests running at: https://github.com/appsmithorg/appsmith/actions/runs/2293289489.
Workflow: Appsmith External Integration Test Workflow.
Commit: db1c8f6.
PR: 13663.

[github-actions]

UI Performance test run logs and artifacts: https://github.com/appsmithorg/appsmith/actions/runs/2293289489.
Commit: db1c8f6.
Results:

Click to view performance test results

	Run 1	Run 2	Run 3	Run 4	Run 5	Median	Mean	SD.Sample	SD.Population
SELECT_WIDGET_MENU_OPEN
scripting	1778.38	1843.13	1868.29	1875.94	1803.29	1843.13	1833.81	2.29	2.05
painting	15.36	12.38	12.43	11.58	24.78	12.43	15.31	35.86	32.07
rendering	621.35	629.04	698.94	697.28	629.55	629.55	655.23	5.99	5.36
SELECT_WIDGET_SELECT_OPTION
scripting	299.84	415.69	390.36	487.16	292.23	390.36	377.06	21.77	19.47
painting	6.23	4.83	5.91	10.84	3.59	5.91	6.28	43.79	39.17
rendering	19.43	20.77	23.51	18.4	19.03	19.43	20.23	10.03	9.00

[github-actions]

UI Performance test run logs and artifacts: https://github.com/appsmithorg/appsmith/actions/runs/2293289489.
Commit: db1c8f6.
Results:

Click to view performance test results

	Run 1	Run 2	Run 3	Run 4	Run 5	Median	Mean	SD.Sample	SD.Population
SELECT_WIDGET_MENU_OPEN
scripting	1778.38	1843.13	1868.29	1875.94	1803.29	1843.13	1833.81	2.29	2.05
painting	15.36	12.38	12.43	11.58	24.78	12.43	15.31	35.86	32.07
rendering	621.35	629.04	698.94	697.28	629.55	629.55	655.23	5.99	5.36
SELECT_WIDGET_SELECT_OPTION
scripting	299.84	415.69	390.36	487.16	292.23	390.36	377.06	21.77	19.47
painting	6.23	4.83	5.91	10.84	3.59	5.91	6.28	43.79	39.17
rendering	19.43	20.77	23.51	18.4	19.03	19.43	20.23	10.03	9.00