Add the appliance_console menu tree model.

[jarovo]

Purpose or Intent

There were some changes introduced to 5.10 which made the console tree different from 5.9. This breaks many tests. I am adding modeling of the console tree in the code so there is an additional layer to lessen the coupling of the menu options to the flow of the actual test.

This also in turn makes the tests more readable and self-documenting.

[dajoRH]

Lint report for commit 228bdb8:

cfme/utils/appliance/__init__.py:

• 🔴 Line 6:1: F401 'tempfile' imported but unused
• 🔴 Line 17:1: F401 'lxml.etree' imported but unused

cfme/utils/appliance/appliance_console.py:

• ‼️ Line 67:5: E303 too many blank lines (2)
• 🔴 Line 210:36: F821 undefined name 'six'
• 🔴 Line 224:20: F821 undefined name 'socket'
• 🔴 Line 240:14: F821 undefined name 'tempfile'
• 🔴 Line 241:21: F821 undefined name 'hidden'
• 🔴 Line 243:13: F821 undefined name 'os'
• 🔴 Line 258:19: F821 undefined name 'yaml'
• 🔴 Line 261:16: F821 undefined name 'lxml'

😱 You might like to check the lint of your code ☝️

No commit flaws detected.

CFME QE Bot

[dajoRH]

Would you mind rebasing this Pull Request against latest master, please?
CFME QE Bot