Test: processing of master stream in slave -BUSY state.
Test: processing of master stream in slave -BUSY state.

See #5297.

antirez/redis,yossigo/redis,neomantra/redis,yossigo/redis,charsyam/redis,ctripcorp/redis,neomantra/redis,soloestoy/redis,PKRoma/redis,charsyam/redis,oranagra/redis,soveran/redis,ctripcorp/redis,yossigo/redis,pmem/redis,soveran/redis,ofirluzon/redis,neomantra/redis,ofirluzon/redis,pmem/redis,oranagra/redis,charsyam/redis,soveran/redis,charsyam/redis,spinlock/redis,antirez/redis,nnog/redis,ctripcorp/redis,spinlock/redis,ofirluzon/redis,ofirluzon/redis,neomantra/redis,soveran/redis,antirez/redis,pmem/redis,neomantra/redis,charsyam/redis,yossigo/redis,ofirluzon/redis,oranagra/redis,soloestoy/redis,PKRoma/redis,spinlock/redis,PKRoma/redis,soloestoy/redis,PKRoma/redis,soloestoy/redis,PKRoma/redis,pmem/redis,nnog/redis,spinlock/redis,ctripcorp/redis,yossigo/redis,nnog/redis,nnog/redis,oranagra/redis,soloestoy/redis,oranagra/redis,antirez/redis