TestKitSpecification does not throw exception on failure when calling runTasksSuccessfully

[DanielThomas]

If you add --info to troubleshoot:

java.lang.NullPointerException: Cannot get property 'outcome' on null object

	at com.netflix.lint.rule.TestKitSpecification.runTasksSuccessfully_closure2(TestKitSpecification.groovy:45)
	at groovy.lang.Closure.call(Closure.java:414)
	at groovy.lang.Closure.call(Closure.java:430)
	at com.netflix.lint.rule.TestKitSpecification.runTasksSuccessfully(TestKitSpecification.groovy:43)
	at com.netflix.lint.rule.dependency.ThirdPartyBomReplacementRuleSpec.multiproject bom replacement(ThirdPartyBomReplacementRuleSpec.groovy:364)