Introduce disable_activate_successors flag #146

Job	Run time
Linux [UBSAN] [lmdb \| clang]	39m 14s
Linux [ASAN] [lmdb \| clang]	41m 19s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	42m 19s
macOS [UBSAN] [lmdb \| clang]	33m 12s
Linux [TSAN] [lmdb \| clang]	39m 0s
macOS [ASAN] [lmdb \| clang]	27m 7s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	38m 3s
macOS [TSAN] [lmdb \| clang]	29m 13s
Linux [UBSAN] [rocksdb \| clang]	47m 27s
macOS [UBSAN] [rocksdb \| clang]	36m 22s
Linux [ASAN] [rocksdb \| clang]	49m 30s
macOS [ASAN] [rocksdb \| clang]	34m 0s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	49m 45s
macOS [TSAN] [rocksdb \| clang]	47m 57s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	51m 24s
	10h 5m 52s

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