[SPARK-25336][SS]Revert SPARK-24863 and SPARK-24748#22334

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zsxwing:revert-SPARK-24863-SPARK-24748

Commits on Sep 4, 2018

Revert "[SPARK-24863][SS] Report Kafka offset lag as a custom metrics"
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Revert "[SPARK-24748][SS] Support for reporting custom metrics via StreamingQuery Progress"
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