HUE-6814 [search] Only return distinct usernames in security impersonate dropdown
HUE-6814 [search] Only return distinct usernames in security impersonate dropdown

cloudera/hue,xq262144/hue,kawamon/hue,kawamon/hue,kawamon/hue,kawamon/hue,cloudera/hue,kawamon/hue,kawamon/hue,cloudera/hue,xq262144/hue,todaychi/hue,cloudera/hue,kawamon/hue,kawamon/hue,cloudera/hue,cloudera/hue,todaychi/hue,xq262144/hue,xq262144/hue,xq262144/hue,xq262144/hue,todaychi/hue,todaychi/hue,cloudera/hue,kawamon/hue,cloudera/hue,kawamon/hue,xq262144/hue,cloudera/hue,cloudera/hue,kawamon/hue,kawamon/hue,kawamon/hue,kawamon/hue,cloudera/hue,cloudera/hue,kawamon/hue,todaychi/hue,todaychi/hue,cloudera/hue,todaychi/hue,kawamon/hue,cloudera/hue,todaychi/hue,cloudera/hue,cloudera/hue,cloudera/hue,kawamon/hue,xq262144/hue,cloudera/hue,todaychi/hue,kawamon/hue,xq262144/hue