Add regions module to integration tests

Regions module should contains basic functionality that should be
shared among multiple page objects: common tables, forms,
notifications etc.. Basically every piece of code that can be reused by
multiple classes in a form of a new object should be placed in here.

* I would suggest that already created regions should be moved into this
  module.

* I would consider region everything that can be reused by at least
  two page objects and aim for maximal code reusability in the future.

* Every new region should inherit from class BaseRegion located in
  baseregion.py.

Partially implements blueprint: selenium-integration-testing

Change-Id: Ib8c20d8833e0830c85030633091663d33de6e3ab
Merge "Add regions module to integration tests"