Integration tests - base class for all web element objects

[Daniel Korn]

pageobject and baseregion should both inherit from the same base web element class.
The new class will contain several wrappers for drivers capabilities, that are now located within pageobject.

It's more of a design issue, The necessity arose while discussing the regions patch (https://review.openstack.org/#/c/102227/).

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/112579
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=f573ef714b4574a2fe77ef0f95e323b7c4280e73
Submitter: Jenkins
Branch: master

commit f573ef714b4574a2fe77ef0f95e323b7c4280e73
Author: dkorn <email address hidden>
Date: Thu Aug 7 16:06:18 2014 +0300

    Integration tests - BaseWebObject class

    I added BaseWebObject, a base class for all web element objects,
    i.e. both page objects and regions.
    The new class now contains several wrappers for driver's
    capabilities, which are required not only by the pages but other
    webelements as well, and used to be located within pageobject.
    The necessity arose while discussing the regions patch
    (https://review.openstack.org/#/c/102227/), that will be
    modified accordingly by tnovacik.

    In addition, I've made 6 methods private, as they should
    not be used outside the pages, definitely not by the tests.

    Partially implements blueprint: selenium-integration-testing
    Closes-Bug: #1354017
    Closes-Bug: #1356774

    Change-Id: Id65951160b2016cbdafd8417df48b1b5cd02f99f