Medium: PE: Optimize the placement strategy (bnc#669686)
The strategy would be:
- The nodes that are more healthy and have more capacities get consumed first
(globally preferred nodes).
- The resources that have higher priorities and have higher scores on globally
preferred nodes get assigned first.
Mercurial revision: e688c5f1957c99cd4d0543611c6b1af35deb5a6c