correct misplaced calls to Get/List in Watch and WatchTree for etcd
correct misplaced calls to Get/List in Watch and WatchTree for etcd

Signed-off-by: Alexandre Beslic <a2bebfa25877ed8f3a644256dc060dfe32006f27@docker.com>

polyverse-security/libkv,zyclonite/libkv,sanimej/libkv,therealbill/libkv,gonkulator/libkv,moxiegirl/libkv,polyverse-security/libkv,christophelec/libkv,bprashanth/libkv,therealbill/libkv,DIREKTSPEED-LTD/libkv,chenchun/libkv,zyclonite/libkv,kasisnu/libkv,kasisnu/libkv,DIREKTSPEED-LTD/libkv,bsmr-docker/libkv,christophelec/libkv,MHBauer/libkv,sanimej/libkv,bsmr-docker/libkv,KimTaehee/libkv,bprashanth/libkv,gonkulator/libkv,KimTaehee/libkv,MHBauer/libkv,moxiegirl/libkv,chenchun/libkv