[WIP] Tests: Use ember-exam to parallelize testing #115

Job	Run time
Tests	1m 41s
Node Tests	37s
Scenario ember-lts-4.8, BS4, Chrome	1m 11s
Floating Dependencies	1m 20s
Docs	1m 23s
Scenario ember-lts-4.8, BS5, Chrome	1m 19s
Test Safari	1m 59s
Scenario ember-lts-5.4, BS4, Chrome	1m 14s
Scenario ember-lts-5.4, BS5, Chrome	1m 15s
Scenario ember-release, BS4, Chrome	1m 16s
Scenario ember-release, BS5, Chrome	1m 26s
Scenario ember-beta, BS4, Chrome	1m 30s
Scenario ember-beta, BS5, Chrome	1m 15s
Scenario ember-canary, BS4, Chrome	1m 13s
Scenario ember-canary, BS5, Chrome	1m 17s
Scenario embroider-safe, BS4, Chrome	1m 12s
Scenario embroider-safe, BS5, Chrome	1m 12s
Scenario embroider-optimized, BS4, Chrome	1m 16s
Scenario embroider-optimized, BS5, Chrome	1m 25s
Scenario ember-release, BS4, Firefox	1m 25s
Scenario ember-release, BS5, Firefox	1m 33s
Scenario tracked-toolbox-v1, BS5,	1m 45s
	29m 44s

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