Parallel execution of workflow steps
Revert overriding changes unrelated to paralell ex
Revert step first workflow strategy changes
Merge branch 'issues/927-Parallel_Execution' of https://github.com/forcedotcom/rundeck into forcedotcom-issues/927-Parallel_Execution2

Conflicts:
	core/src/main/java/com/dtolabs/rundeck/core/execution/workflow/BaseWorkflowStrategy.java
	rundeckapp/grails-app/i18n/messages.properties
	rundeckapp/grails-app/views/execution/_execDetailsWorkflow.gsp
Fix java issues
Show parallel strategy option if feature enabled
should fail if the job is killed
Merge branch 'forcedotcom-issues/927-Parallel_Execution2' into development