Have distclean remove Maven's target directory.
Have distclean remove Maven's target directory.

Change-Id: Id12de927474bca71d09fe6b9345b6c6b6788e705

tsuna/asynchbase,StumbleUponArchive/asynchbase,tsuna/asynchbase,adityakishore/asynchbase,StumbleUponArchive/asynchbase,mway08/asynchbase,adityakishore/asynchbase,mapr/asynchbase,manolama/asynchbase,manolama/asynchbase,OpenTSDB/asynchbase,angushe/asynchbase,yuzhu712/asynchbase,nvoron23/asynchbase,yuzhu712/asynchbase,SteamShon/asynchbase,hzy001/asynchbase,SteamShon/asynchbase,tempbottle/asynchbase,tempbottle/asynchbase,hzy001/asynchbase,OpenTSDB/asyncbigtable,pythian/asynchbase,nvoron23/asynchbase,angushe/asynchbase,mapr/asynchbase,OpenTSDB/asynchbase,Connexity/asynchbase,hhshuai/asynchbase,hhshuai/asynchbase,mway08/asynchbase,manolama/asyncbigtable,Connexity/asynchbase