[jira] [Created] (FLINK-12432) Add SchedulerNG Stub Implementation

[Shang Yuanchun (Jira)]

Gary Yao created FLINK-12432:
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             Summary: Add SchedulerNG Stub Implementation
                 Key: FLINK-12432
                 URL: https://issues.apache.org/jira/browse/FLINK-12432
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Coordination
            Reporter: Gary Yao
            Assignee: Gary Yao


Add a stub implementation of the {{SchedulerNG}} interface that can be configured as a replacement for {{LegacyScheduler}}.

*Acceptance Criteria*
* Stub implementation of {{SchedulerNG}} is added ({{DefaultSchedulerNG}})
* {{DefaultSchedulerNG}} can be enabled via feature toggle in {{flink-conf.yaml}}
** If the feature toggle is not configured, {{LegacyScheduler}} should be used a a default.




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