Rocksdb tx cleanup #2260

Job	Run time
macOS [UBSAN] [lmdb \| clang]	37m 32s
Linux [UBSAN] [lmdb \| clang]	42m 59s
macOS [ASAN] [lmdb \| clang]	29m 53s
Linux [ASAN] [lmdb \| clang]	40m 38s
macOS [TSAN] [lmdb \| clang]	32m 36s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	40m 23s
macOS [UBSAN] [rocksdb \| clang]	41m 4s
Linux [TSAN] [lmdb \| clang]	44m 49s
macOS [ASAN] [rocksdb \| clang]	41m 6s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	41m 53s
macOS [TSAN] [rocksdb \| clang]	52m 40s
Linux [UBSAN] [rocksdb \| clang]	51m 27s
Linux [ASAN] [rocksdb \| clang]	56m 48s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	56m 22s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	56m 44s
	11h 6m 54s

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