Alphabetize object attributes when displaying them in list view in CLI

[jathanism]

The nsot CLI utility does not sort attributes by key. It would be nice if it did.

Incidentally when displaying in "grep-friendly" output using -g/--grep the keys are sorted.

[jathanism]

Example:

$ nsot devices list -H foo2-bb02
+------------------------------------------------+
| ID      Hostname (Key)   Attributes            |
+------------------------------------------------+
| 29759   foo2-bb02        vendor=juniper        |
|                          monitor=alerted       |
|                          metro=foo             |
|                          facility=foo2         |
|                          dc=foo2               |
|                          role=bb               |
|                          owner=team-networking |
|                          model=QFX10008        |
|                          hw_type=router        |
+------------------------------------------------+

$ nsot devices list -H foo2-bb02 -g
foo2-bb02 dc=foo2
foo2-bb02 facility=foo2
foo2-bb02 hw_type=router
foo2-bb02 metro=foo
foo2-bb02 model=QFX10008
foo2-bb02 monitor=alerted
foo2-bb02 owner=team-networking
foo2-bb02 role=bb
foo2-bb02 vendor=juniper

In the first view, which is the default view, note that the attributes are not sorted.

In the second view, which is "grep-friendly" view, note that the attributes are sorted.

We want the attributes in the default view to also be sorted.