HUE-4403 [aws] Close file after read using fast=True
HUE-4403 [aws] Close file after read using fast=True

This avoids reading the whole file: http://boto.cloudhackers.com/en/latest/ref/s3.html#boto.s3.key.Key.close

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