Downstreamed changes from @embroider/addon-blueprint@2.7.0 (#215) #930

Job	Run time
Build (docs-app)	1m 24s
Lint (docs-app)	43s
Test compatibility (ember-lts-4.4)	56s
Test (ember-container-query)	48s
Lint (ember-container-query)	48s
Test compatibility (ember-lts-4.8)	1m 40s
Test (test-app)	53s
Test compatibility (ember-lts-4.12)	57s
Lint (test-app)	56s
Test compatibility (ember-release)	56s
Test compatibility (ember-beta)	1m 25s
Test compatibility (ember-canary)	57s
Test compatibility (embroider-safe)	1m 49s
Test compatibility (embroider-optimized)	1m 31s
Test (docs-app) (w1-h1)	1m 13s
Test (docs-app) (w2-h1)	43s
Test (docs-app) (w3-h1)	1m 7s
Test (docs-app) (w1-h2)	1m 3s
Test (docs-app) (w2-h2)	1m 24s
Test (docs-app) (w3-h2)	1m 16s
Test (docs-app) (w1-h3)	50s
Test (docs-app) (w2-h3)	57s
Test (docs-app) (w3-h3)	1m 1s
	25m 17s

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