Replace assertEqual(None, *) with assertIsNone in tests

Replace assertEqual(None, *) with assertIsNone in tests to have
more clear messages in case of failure.

Change-Id: Ifbb144e26b62790d8b8ba9b5c3eea7d04844ee19
Closes-Bug:#1280522
Remove vim header

No need to set tabstop tons of times, this can be set in your vimrc
file instead.

More disucssion:
http://openstack.10931.n7.nabble.com/Remove-vim-modelines-td21780.html

Change-Id: I45766d91f0c0b3622bbdc7dc5517497c87ebee8c
Closes-Bug: #1229324
Merge "Replace assertEqual(None, *) with assertIsNone in tests"
Adding datastore_version column to instances list table

Change-Id: Ieef6b41d97c71ffd4099c199c1221f23628012db
Closes-Bug: #1279952
Fix JSON In Output for Configuration Groups

the configuration-group values will now correctly show as json
before: {'key': True}, after:  {"key": true}

Change-Id: I824c73e96da8e7ec52fc020db8f22e7e8d7b7d18
Closes-Bug: #1290200
Improve help strings

Make help strings more consistent:
* Fix spelling and capitalization
* Add "." at end of each string
* Fix spaces.
* Improve wording

Change-Id: I22e84ebecb87f1c803cfb8369db3798fe56903ff
Remove arguments deprecated after Diablo

Change-Id: Ia65ee002ad2aa2b6d2401586d1e06b8ffdb633dd
Closes-Bug: #1279483
Add Python 3 classifiers

Closes-Bug: 1288264
Change-Id: I99c5b19127e66288b5121d6a1399df1b4be0e890
Merge "Add Python 3 classifiers"
Merge "Improve help strings"
Merge "Fix JSON In Output for Configuration Groups"
Add instance_metadata functionality to the trove python library

Change-Id: I4e498844afd2d2730fad2176dccaf1d61d8798c1