Major changes:
- Fix json response validation
- Add param --rundeck.projects.executions.cache and env RUNDECK_PROJECTS_EXECUTIONS_CACHE
- Add counter metrics rundeck_services_[services,controllers,api,web]_total
- Remove all gauge metrics rundeck_[services,controllers,api,web]...{type="..."}
- Remove metrics rundeck_system_stats_[cpu,memory,uptime_duration]...
- Remove param --rundeck.token. Need RUNDECK_TOKEN env now.
- Remove param --rundeck.projects.executions.limit
- Remove rundeck_node label from all metrics
- Change rundeck_project_executions_info metrics to rundeck_project_status{job_id=...,job_name=...,project_name=...,status=....}