assertRaisesRegexp was renamed to assertRaisesRegex in Py3.2
For more details, please check:
https://docs.python.org/3/library/
unittest.html#unittest.TestCase.assertRaisesRegex

Change-Id: I89cce19e80b04074aab9f49a76c7652acace78b3
Closes-Bug: #1436957

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

Change-Id: I74452af6d840bcf612fd3bb2521db9134460dd63
Closes-Bug: #1280522

Sometimes you need to access the metadata from listeners
and currently that requires a private property access.

Change-Id: Ib4f15650b15dfe8a04dbb690607d515663371d90
Fixes: #1511086

First parameter should be the expected value.

Change-Id: I2941296e38c3245da298cc64aeb5636fbc4b2eb6
Partial-Bug: #1357117

When a atom is reverted it can be useful to retain the
result of that 'revert' method being called, so that it
can be later analyzed (or used for various purposes) so
adjust the storage, and actions to enable it to be stored.

Change-Id: I38a9a5f3bf7550e924468bb4a86652cb8beb306c

Since this module contains more than the logbook
class and really is a our generic models that are used
to hold the runtime structure it is more appropriate to
place it under a models module and deprecate the usage
of the old module by placing a warning there (so that
when it is imported that warning is triggered).

Change-Id: I79def5ee08f560d38f2c9dcefd0b33becc2a4d36

Instead of only storing injected atom arguments in memory
allow for specifying those to be persisted; so that users
who desire this feature can persist them (it defaults to
being transient to retain the old API behavior).

This also reworks the validating of engine dependencies
to be more correct. It removes the validation of these
dependencies from the prepare() method and moves them to a
new engine validate() method; this allows users to prepare()
the engine, then inject there atom non-transient arguments
and then validate(); the validation would fail prior to this
at preparation time since no injected arguments would
exist and the user would not have the ability to inject any
that target a specific atom, since the atom detail would
not have been created yet (since that is populated in the
prepartion method).

Change-Id: I2846d0334db32a115592f850d85b206d9e6a3f07

Change-Id: Ic018b6653acbe1cdba3e2ad20277aa17417c7cd2