Fix ugly view for shell response on security-group list for instances that has more than one rule

[Denis M.]

+----+-----------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------------------------+
| id | name | rules | instance_id |
+----+-----------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------------------------+
| 2 | SecGroup_81cce066-41ae-4142-9bcd-61cdc80058de | [{u'to_port': 7001, u'cidr': u'0.0.0.0/0', u'from_port': 7001, u'protocol': u'tcp', u'id': u'1'}, {u'to_port': 7000, u'cidr': u'0.0.0.0/0', u'from_port': 7000, u'protocol': u'tcp', u'id': u'2'}, {u'to_port': 9160, u'cidr': u'0.0.0.0/0', u'from_port': 9160, u'protocol': u'tcp', u'id': u'3'}, {u'to_port': 9042, u'cidr': u'0.0.0.0/0', u'from_port': 9042, u'protocol': u'tcp', u'id': u'4'}] | 81cce066-41ae-4142-9bcd-61cdc80058de |
+----+-----------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------------------------+

Was made a certain decision to add next command:
trove secgroup-list-rules <secgroup-id>

This would change would allow to avoid security group rules sub-formatting inside "trove secgroup-list"

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/85314

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/85314
Committed: https://git.openstack.org/cgit/openstack/python-troveclient/commit/?id=b8fa51d9d04f56a593498afd06c4954d2ba99fb0
Submitter: Jenkins
Branch: master

commit b8fa51d9d04f56a593498afd06c4954d2ba99fb0
Author: Denis Makogon <email address hidden>
Date: Thu Jun 12 13:38:30 2014 +0300

    Fix shell view for secgroup-* commands

    Reasons:
     - currect code writes list of dict as they are,
       without any formatting, actually _print_
       method calls str() on each attribute,
       this issue spoils human-readable form of the shell output.

    Changes:
     - updated "secgroup-list" (`rules` attributes was ignored);
     - updated "secgroup-show" (`rules` attribute was ripped off);
     - proposed new call "secgroup-list-rules <secgroup-id>";

    Change-Id: Ic3f51b93af106c39de7eb3238f8bcffa3ea3cb95
    Closes-Bug: #1300164
    DocImpact: added new CLI command.