Fix: crmd: Ensure crm_config options are re-read on updates
Feature: pengine: Support cluster-specific instance attributes based on rules

The "site" term is preserved for a per-node's attribute in a stretch cluster.
Test: pengine: Support cluster-specific instance attributes based on rules
Test: pengine: Support site-specific instance attributes based on rules for stretch cluster
Merge pull request #510 from gao-yan/cluster-site-specific-params

Support cluster-specific and site-specific instance attributes based on rules
Merge pull request #509 from inouekazu/fix_reread

Fix: crmd: Ensure crm_config options are re-read on updates
Fix: xml: Clean up schema list at exit
Merge branch 'master' of github.com:ClusterLabs/pacemaker