Fix the print order of quota-show

Current "nova qouta-show" prints quotas by random order like the
following:

 $ nova quota-show
 +-----------------------------+-------+
 | Property                    | Value |
 +-----------------------------+-------+
 | metadata_items              | 128   |
 | injected_file_content_bytes | 10240 |
 | ram                         | 51200 |
 | floating_ips                | 10    |
 | key_pairs                   | 100   |
 | instances                   | 10    |
 | security_group_rules        | 20    |
 | injected_files              | 5     |
 | cores                       | 20    |
 | fixed_ips                   | -1    |
 | injected_file_path_bytes    | 255   |
 | security_groups             | 10    |
 +-----------------------------+-------+
 $

This patch fixes its order for fitting to the option order of
"nova quota-update" like the following:

 $ nova quota-show
 +-----------------------------+-------+
 | Quota                       | Limit |
 +-----------------------------+-------+
 | instances                   | 10    |
 | cores                       | 20    |
 | ram                         | 51200 |
 | floating_ips                | 10    |
 | fixed_ips                   | -1    |
 | metadata_items              | 128   |
 | injected_files              | 5     |
 | injected_file_content_bytes | 10240 |
 | injected_file_path_bytes    | 255   |
 | key_pairs                   | 100   |
 | security_groups             | 10    |
 | security_group_rules        | 20    |
 +-----------------------------+-------+

Fixes bug #1223233

Change-Id: I482fd26b9114ac718dc4a16753e7692213bd3690
Merge "Fix the print order of quota-show"