Use new priority timestamp in priority scheduler #2536

Job	Run time
Linux [UBSAN] [lmdb \| clang]	36m 20s
Linux [ASAN] [lmdb \| clang]	39m 52s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	41m 32s
macOS [UBSAN] [lmdb \| clang]	32m 4s
macOS [ASAN] [lmdb \| clang]	26m 54s
Linux [TSAN] [lmdb \| clang]	38m 32s
Linux [LEAK] [lmdb \| clang]	36m 58s
macOS [TSAN] [lmdb \| clang]	30m 16s
Linux [UBSAN] [rocksdb \| clang]	46m 24s
macOS [UBSAN] [rocksdb \| clang]	41m 7s
Linux [ASAN] [rocksdb \| clang]	51m 16s
macOS [ASAN] [rocksdb \| clang]	37m 50s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	54m 51s
macOS [TSAN] [rocksdb \| clang]	48m 22s
Linux [LEAK] [rocksdb \| clang]	54m 25s
	10h 16m 43s

Provide feedback