Improve server types readability for datacenter describe command

[jooola]

TL;DR

The output of the datacenter describe command yield a list of server type in a YAML like format. This is not easy to read and does not present the important data as it should (availability, etc.).

Expected behavior

We could either use a table or tab delimited columns, to have:

Server Types:
  - ID:   1,	Name: cx11,	Available: yes,	Supported: no
  - ID:   3,	Name: cx21,	Available: yes,	Supported: no
  - ID:   5,	Name: cx31,	Available: yes,	Supported: no
  - ID:   7,	Name: cx41,	Available: yes,	Supported: no
  - ID:   9,	Name: cx51,	Available: yes,	Supported: no
  - ID: 104,	Name: cx22,	Available: yes,	Supported: yes
  - ID: 105,	Name: cx32,	Available: yes,	Supported: yes
  - ID: 106,	Name: cx42,	Available: yes,	Supported: yes
  - ID: 107,	Name: cx52,	Available: yes,	Supported: yes

| ID  | Name | Available | Supported |
| :-- | :--- | --------- | --------- |
| 1   | cx11 | yes       | no        |
| 3   | cx21 | yes       | no        |
| 5   | cx31 | yes       | no        |
| 7   | cx41 | yes       | no        |
| 9   | cx51 | yes       | no        |
| 104 | cx22 | yes       | yes       |
| 105 | cx32 | yes       | yes       |
| 106 | cx42 | yes       | yes       |
| 107 | cx52 | yes       | yes       |