Wrong accessibility of properties in Instance hierarchy

[Alexander Tivelkov]

`environment` and `resources` properties of `Instance` class are assigned but not declared (and thus are private runtime properties), but are accessed from the inheritors of the class, which causes deployment-time exceptions

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/97779

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/97779
Committed: https://git.openstack.org/cgit/stackforge/murano/commit/?id=66eed1adf4b3968c912e363eb64b79369a78f881
Submitter: Jenkins
Branch: master

commit 66eed1adf4b3968c912e363eb64b79369a78f881
Author: Alexander Tivelkov <email address hidden>
Date: Wed Jun 4 17:03:59 2014 +0400

    Correct property accessibility for classes in Instance hierarchy

    `environment` and `resources` properties are no longer used in classes which
    inherit `Instance` (local vars are used instead)

    Change-Id: I2f3eb64157d2754fedffa66b814f26aa62081456
    Closes-Bug: #1326369