Modify Node::repair method for nodetool cluster repair #350

Job	Run time
CCM Integration tests (using Nix) / build	12m 4s
CCM Integration tests / build (3.8)	7m 4s
CCM Integration tests / build (3.11)	9m 31s
CCM Integration tests / build (3.12)	7m 41s
	36m 20s

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