redis-trib fix: use MIGRATE REPLACE when fixing slots.
redis-trib fix: use MIGRATE REPLACE when fixing slots.

This fixes issue #1765.

splitice/redis,MSOpenTech/redis,Hailei/redis,slfs007/mk-redis,splitice/redis,maodeyi/redis_lua,ksarch-saas/redis,MSOpenTech/redis,Hailei/redis,darksideofthemoo/redis-histogram,MSOpenTech/redis,ksarch-saas/redis,ramonsnir/redis,ramonsnir/redis,ksarch-saas/redis,jxwr/redis,slfs007/mk-redis,Hailei/redis,himoca/redis,HunanTV/redis,xuzhezhaozhao/redis_reading,MSOpenTech/redis,splitice/redis,ttuna/msot-redis,ramonsnir/redis,jxwr/redis,louisliangjun/redis,darksideofthemoo/redis-histogram,MSOpenTech/redis,maodeyi/redis_lua,jxwr/redis,xuzhezhaozhao/redis_reading,louisliangjun/redis,darksideofthemoo/redis-histogram,HunanTV/redis,HunanTV/redis,louisliangjun/redis,ksarch-saas/redis,HunanTV/redis,ttuna/msot-redis,slfs007/mk-redis,xuzhezhaozhao/redis_reading,himoca/redis,ttuna/msot-redis,spearhead-ea/redis,spearhead-ea/redis,louisliangjun/redis,splitice/redis,spearhead-ea/redis,ttuna/msot-redis,Hailei/redis,xuzhezhaozhao/redis_reading,ttuna/msot-redis,maodeyi/redis_lua,himoca/redis,darksideofthemoo/redis-histogram