add 4-layer test case to namespace support
add 4-layer test case to namespace support

hachi8833/goby,Maxwell-Alexius/goby,Maxwell-Alexius/goby,st0012/Rooby,hachi8833/goby,Maxwell-Alexius/goby,hachi8833/goby,goby-lang/goby,goby-lang/goby,goby-lang/goby,st0012/Rooby