Changed ember-qunit theme #990

Job	Run time
Lint (docs-app)	33s
Build (docs-app)	48s
Lint (packages/ember-container-query)	25s
Test compatibility (ember-lts-4.4)	1m 13s
Test (packages/ember-container-query)	26s
Lint (test-app)	28s
Test compatibility (ember-lts-4.8)	53s
Test (test-app)	48s
Test compatibility (ember-lts-4.12)	53s
Test compatibility (ember-lts-5.4)	50s
Test compatibility (ember-lts-5.8)	1m 9s
Test compatibility (ember-release)	49s
Test compatibility (ember-beta)	1m 5s
Test compatibility (ember-canary)	1m 3s
Test compatibility (embroider-safe)	1m 5s
Test compatibility (embroider-optimized)	53s
Test (docs-app) (w1-h1)	51s
Test (docs-app) (w2-h1)	1m 6s
Test (docs-app) (w3-h1)	1m 7s
Test (docs-app) (w1-h2)	43s
Test (docs-app) (w2-h2)	1m 13s
Test (docs-app) (w3-h2)	43s
Test (docs-app) (w1-h3)	56s
Test (docs-app) (w2-h3)	54s
Test (docs-app) (w3-h3)	1m 9s
	22m 3s

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