Modify Node::repair method for nodetool cluster repair #323

Job	Run time
CCM Integration tests (using Nix) / build	13m 19s
CCM Integration tests / build (3.8)	7m 47s
CCM Integration tests / build (3.11)	6m 24s
CCM Integration tests / build (3.12)	7m 18s
	34m 48s

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