[Tests] ProgressViewTests.testItemOrder is flaky

[ktatavarthi]

The testcase org.eclipse.ui.tests.progress.ProgressViewTests.testItemOrder keeps failing randomly in the I-build

This issue is created to track the bug 553430

[ktatavarthi]

This test failed in the I-Build I20220706-1800 on macM1 with the below error

Wrong job order: arrays first differed at element [0]; expected:<1. User Job(1193)> but was:<4. Usual job 2(1196)>

Wrong job order: arrays first differed at element [0]; expected:<1. User Job(1193)> but was:<4. Usual job 2(1196)>
at org.junit.internal.ComparisonCriteria.arrayEquals(ComparisonCriteria.java:78)
at org.junit.internal.ComparisonCriteria.arrayEquals(ComparisonCriteria.java:28)
at org.junit.Assert.internalArrayEquals(Assert.java:534)
at org.junit.Assert.assertArrayEquals(Assert.java:285)
at org.eclipse.ui.tests.progress.ProgressViewTests.testItemOrder(ProgressViewTests.java:193) 

[ktatavarthi]

This test failed in the I-Build I20220928-1800 on macM1 with the below error

Wrong job order: arrays first differed at element [0]; expected:<1. User Job(1193)> but was:<4. Usual job 2(1196)>

Wrong job order: arrays first differed at element [0]; expected:<1. User Job(1193)> but was:<4. Usual job 2(1196)>
at org.junit.internal.ComparisonCriteria.arrayEquals(ComparisonCriteria.java:78)
at org.junit.internal.ComparisonCriteria.arrayEquals(ComparisonCriteria.java:28)
at org.junit.Assert.internalArrayEquals(Assert.java:534)
at org.junit.Assert.assertArrayEquals(Assert.java:285)
at org.eclipse.ui.tests.progress.ProgressViewTests.testItemOrder(ProgressViewTests.java:193)