Fix dupliated words issue like " by by which"
Fix dupliated words issue like " by by which"

This is to fix the duplicated words issue like
"The name of key by by which".

Change-Id: I7b0897eb40c6b587521d727d4fd2f60e4058040b

ChameleonCloud/horizon,openstack/horizon,ChameleonCloud/horizon,openstack/horizon,openstack/horizon,openstack/horizon,ChameleonCloud/horizon,ChameleonCloud/horizon