Description of problem:
Very minor issue, as usual, a short option is separated by a space from the option argument, e.g. -n ARG or -nARG, but the atomic top -o {time,stime,ppid,uid,gid,user,group} <image> doesn't work.


Version-Release number of selected component (if applicable):

[cloud-user@plat-infra-4zpfp3 ~]$ sudo atomic host status
  TIMESTAMP (UTC)         VERSION     ID             OSNAME               REFSPEC                                                        
* 2016-04-12 14:20:45     7.2.3-1     644fcc6035     rhel-atomic-host     rhel-atomic-host-ostree:rhel-atomic-host/7/x86_64/standard

[cloud-user@plat-infra-4zpfp3 ~]$ rpm -q atomic docker
atomic-1.9-4.gitff44c6a.el7.x86_64
docker-1.9.1-25.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1. docker run -d -it busybox /bin/sh
2. docker ps
3. atomic top -n 2 -o user <container_id>

Actual results:

[cloud-user@plat-infra-4zpfp3 ~]$ sudo docker ps
CONTAINER ID        IMAGE                                      COMMAND             CREATED             STATUS              PORTS               NAMES
194a92caef3f        busybox                                    "/bin/sh"           4 seconds ago       Up 3 seconds                            thirsty_brattain

[cloud-user@plat-infra-4zpfp3 ~]$ sudo atomic top -n 2 194a92caef3f|grep bin
194a92caef3f thirsty_brattain 15906      0.1    0.0    0      0      /bin/sh
194a92caef3f thirsty_brattain 15906      0.1    0.0    0      0      /bin/sh

[cloud-user@plat-infra-4zpfp3 ~]$ sudo atomic top -n 2 -ouser 194a92caef3f|grep -iA1 user
CONTA(I)NER* (N)AME           (P)ID      (C)PU  (M)EM  (U)ID  (G)ID  USER       CMD    
194a92caef3f thirsty_brattain 15906      0.0    0.0    0      0      root       /bin/sh
--
CONTA(I)NER* (N)AME           (P)ID      (C)PU  (M)EM  (U)ID  (G)ID  USER       CMD    
194a92caef3f thirsty_brattain 15906      0.0    0.0    0      0      root       /bin/sh

[cloud-user@plat-infra-4zpfp3 ~]$ sudo atomic top -n 2 -o=user 194a92caef3f|grep -iA1 user
CONTA(I)NER* (N)AME           (P)ID      (C)PU  (M)EM  (U)ID  (G)ID  USER       CMD    
194a92caef3f thirsty_brattain 15906      0.0    0.0    0      0      root       /bin/sh
--
CONTA(I)NER* (N)AME           (P)ID      (C)PU  (M)EM  (U)ID  (G)ID  USER       CMD    
194a92caef3f thirsty_brattain 15906      0.0    0.0    0      0      root       /bin/sh

[cloud-user@plat-infra-4zpfp3 ~]$ sudo atomic top -n 2 -o user 194a92caef3f|grep -iA1 user
/bin/atomic: argument -o/--optional: invalid choice: '194a92caef3f' (choose from 'time', 'stime', 'ppid', 'uid', 'gid', 'user', 'group')
Try 'atomic top --help' for more information.

NOTE: the short option should be separated by a space not '=' from the option argument


Expected results:

Additional info:

In addtion, it seems we have implemented many -o/--optional options[1], but it only supports {time,stime,ppid,uid,gid,user,group} options in -o/--optional now.

[1]
[root@dell-per630-02 atomic]# grep "'shortname':" Atomic/top.py
            {'shortname': '%CPU', 'column': '(C)PU', 'character': 'c', 'sort': True, 'index': 3,
            {'shortname': 'CID', 'column': 'CONTA(I)NER', 'character': 'i', 'sort': True, 'index': 0,
            {'shortname': 'NAME', 'column': '(N)AME', 'character': 'n', 'sort': True, 'index': 1,
            {'shortname': 'PID', 'column': '(P)ID', 'character': 'p', 'sort': True, 'index': 2,
            {'shortname': '%MEM', 'column': '(M)EM', 'character': 'm', 'sort': True, 'index': 4,
            {'shortname': 'CMD', 'column': 'CMD', 'character': None, 'sort': False, 'index': 99,
            {'shortname': 'TIME', 'column': '(T)IME', 'character': 't', 'sort': True, 'index': 6,
            {'shortname': 'STIME', 'column': '(S)TIME', 'character': 's', 'sort': True, 'index': 7,
            {'shortname': 'PPID', 'column': 'PPI(D)', 'character': 'd', 'sort': True, 'index': 8,
            {'shortname': 'UID', 'column': '(U)ID', 'character': 'u', 'sort': True, 'index': 9,
            {'shortname': 'GID', 'column': '(G)ID', 'character': 'g', 'sort': True, 'index': 10,
            {'shortname': 'USER', 'column': 'USER', 'character': None, 'sort': False, 'index': 11,
            {'shortname': 'GROUP', 'column': 'GROUP', 'character': None, 'sort': False, 'index': 12,


It's a trivial matter, so I think we may fix them in one patch.