Remove unnecessary logging from memcached error conversion
Remove unnecessary logging from memcached error conversion

pathirana/revel,veliamsli/revel,ggerman/revel,imjerrybao/revel,notzippy/revel,huacnlee/revel,pathirana/revel,w4ngyi/revel,cavaliercoder/revel,folpindo/revel,veliamsli/revel,tempbottle/revel,robfig/revel,jmptrader/revel,Gazillion-Platform-Team/revel,veliamsli/revel,tempbottle/revel,cavaliercoder/revel,nubleer/revel,lili2311/revel,zog/revel,jmptrader/revel,nubleer/revel,vahid-sohrabloo/revel,cavaliercoder/revel,w4ngyi/revel,huacnlee/revel,trigrass2/revel,salixvideo/revel,birkirb/revel,marklap/revel,revel/revel,cokeboL/revel,zog/revel,Jxspy/revel,lili2311/revel,birkirb/revel,ggerman/revel,notzippy/revel,marklap/revel,jenalgit/revel,cw2018/revel,imjerrybao/revel,hustbill/revel,lgscofield/revel,James0tang/revel,roblillack/mars,webdev1001/revel,roblillack/revel,ggerman/revel,James0tang/revel,roblillack/mars,salixvideo/revel,imjerrybao/revel,klauspost/revel,jenalgit/revel,zacklin923/revel,roblillack/revel,kaneshin/revel-revel,shima-park/revel,jmptrader/revel,zog/revel,cw2018/revel,zacklin923/revel,shima-park/revel,zacklin923/revel,Gazillion-Platform-Team/revel,marklap/revel,Jxspy/revel,birkirb/revel,James0tang/revel,Jxspy/revel,tempbottle/revel,shima-park/revel,kaneshin/revel-revel,cokeboL/revel,mattbaird/revel,cokeboL/revel,roblillack/revel,pathirana/revel,runner-mei/revel,Gazillion-Platform-Team/revel,trigrass2/revel,cw2018/revel,runner-mei/revel,huacnlee/revel,hustbill/revel,folpindo/revel,salixvideo/revel,hustbill/revel,notzippy/revel,trigrass2/revel,lili2311/revel,lgscofield/revel,metafex/revel,vahid-sohrabloo/revel,w4ngyi/revel,vahid-sohrabloo/revel,jenalgit/revel,folpindo/revel,revel/revel,PatidarWeb/revel,lgscofield/revel