tests improved, verify added
Merge branch 'tests_improved_verify' of github.com:Ragazzo/yii2 into Ragazzo-tests_improved_verify

Conflicts:
	apps/basic/tests/README.md
	apps/basic/tests/unit/models/LoginFormTest.php
Fixes #1782
doc update.
Fix typos in constant
Fixes #1856: The default CSS class for hint generated by `ActiveField` is changed to `help-block`
Revert "Fixes #1856: The default CSS class for hint generated by `ActiveField` is changed to `help-block`"

This reverts commit 7ae4695d0cf46f3347ff8f340f572a08419f21a7.
docs added
tests improved
code fix
tests improved
CS fix.
Fixes #2341, fixes #2317: moved codeception dependecies to "suggest" section, fixed codeception version on stable branch
Updated readme in apps/basic/tests
Fixed list in tests readme
Reverted numbered list
Reordered items
Fixed suggest descriptions
Edited description
added yii console command to tests