Cluster test: catch FLUSHALL errors on node reset.
Cluster test: catch FLUSHALL errors on node reset.

FLUSHALL will fail on read-only slaves, but there the command is not
needed in order to reset the instance with CLUSTER RESET so errors can
be ignored.

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