Reorder switchover cleanup to match reversed order of checks in _drop… #642

Job	Run time
behave (archive)	3m 30s
behave (async)	7m 7s
behave (autofailover)	16m 22s
behave (cascade)	21m 30s
behave (consecutive_switch)	10m 0s
behave (coordinator)	11m 46s
behave (coordinator_fail)	16m 20s
behave (dead_primary_switchover)	14m 36s
behave (disable_sync)	9m 34s
behave (failed_promote)	31m 1s
behave (failover_timeout)	37m 49s
behave (initialization)	4m 52s
behave (kill_non_ha_replica)	12m 22s
behave (kill_primary)	39m 22s
behave (kill_replica)	39m 58s
behave (maintenance)	17m 41s
behave (op_track)	4m 49s
behave (pgconsul_util)	19m 11s
behave (plugins)	6m 11s
behave (primary_switch)	5m 4s
behave (priority)	13m 12s
behave (reset_sync)	4m 52s
behave (single_node)	5m 19s
behave (slot)	3m 49s
behave (start)	6m 38s
behave (switchover)	42m 25s
behave (targeted_switchover)	14m 32s
	6h 59m 52s

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