Feature: libpe_status: drop support for operation meta-attributes in instance_attributes

This means that values specified in <op> <instance_attributes> will be passed
to resource agents only by their OCF_RESKEY_ environment variable name, not
(additionally) prefixed with OCF_RESKEY_CRM_meta_; and that any operation
parameters (timeout, on-fail, etc.) specified in instance_attributes will be
ignored.

Affected regression tests have been updated.