This patch removes 'audit_scope' from __init__ of
BaseClusterDataModelCollector class, as it is a singleton class
and cannot be instantiate more than once.
A new method is defined in BaseClusterDataModelCollector in place
of property audit_scope_handler, which takes audit_scope as
argument.
Change-Id: I0664c151d71a711c118d43c180d8b0760b1c81fa
Closes-Bug: #1732849