WFLY-1403 BZ967842 fixing a bug in the name of rollout plan and removing explicit ordering of test methods

The RolloutPlanTestCase#testMaxFailServersPercentageRolloutPlan in the domain mode testsuite contains a bug as it refers to 'maxFailOnePlan' plan instead of 'maxFailPercPlan'. Hence, if the test methods are not run in alphabetical order they will fail due to this bug.

https://issues.jboss.org/browse/WFLY-1403