Reduce thread sleep time #2377

Job	Run time
Linux [UBSAN] [lmdb \| clang]	38m 27s
Linux [ASAN] [lmdb \| clang]	39m 10s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	38m 14s
macOS [UBSAN] [lmdb \| clang]	33m 19s
Linux [TSAN] [lmdb \| clang]	40m 23s
macOS [ASAN] [lmdb \| clang]	29m 24s
Linux [LEAK] [lmdb \| clang]	41m 19s
Linux [UBSAN] [rocksdb \| clang]	45m 38s
macOS [TSAN] [lmdb \| clang]	27m 14s
Linux [ASAN] [rocksdb \| clang]	52m 15s
macOS [UBSAN] [rocksdb \| clang]	39m 24s
macOS [ASAN] [rocksdb \| clang]	34m 1s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	53m 48s
macOS [TSAN] [rocksdb \| clang]	52m 33s
Linux [LEAK] [rocksdb \| clang]	52m 53s
	10h 18m 2s

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