Make the `ls` command compatible with `hdfs dfs -ls`

[prateek]

Two parts:

• Make hh ls accept the same flags as hdfs dfs -ls

Usage: hadoop fs [generic options] -ls [-d] [-h] [-R] [<path> ...]

• The output of hh ls should be the same structure as hdfs dfs -ls.

e.g. -

[~]$ hdfs dfs -ls /user/prungta
Found 3 items
drwx------   - prungta supergroup          0 2016-04-28 17:00 /user/prungta/.Trash
drwxr-xr-x   - prungta supergroup          0 2016-04-29 23:24 /user/prungta/.sparkStaging
drwx------   - prungta supergroup          0 2016-05-03 18:34 /user/prungta/.staging
[~]$ hh ls /user/prungta
Found 3 items
drwx------ - prungta supergroup 0 2016-04-29 00:00 .Trash
drwxr-xr-x - prungta supergroup 0 2016-04-30 06:24 .sparkStaging
drwx------ - prungta supergroup 0 2016-05-04 01:34 .staging

Looks like hh is doing three things differently:

• the tab between group and size
• timezone handling (using utc instead of localtime)
• auto truncating the output of the paths to not include the full path