Add AnomalyDetectot service in local controller.

M
Fix.
Merge branch 'develop' into addLCMetrics

Conflicts:
	src/main/java/org/inria/myriads/snoozenode/util/ManagementUtils.java
Add libvirVirtualMachineHost
remove contructor parameters
Abstract Resource demand estimator
add host resource estimator.
Anomaly resolver externalization.
* fix migration (copy virtual machine meta data)
* Add enable option (anomaly detector)
* Add cassandra support for LC metrics.
* Add plugins directory

M
Plugin step : 
HostMonitor
Anomaly resolver
dispatching 

Fix ResourceDemandEstimator / StaticDynamicResourceDemandEstimator
Plugin step:
Consolidation
Plugin step: 
Make call to placement algorithm consistent with the other choices.

M
Plugin step:
assignement policy

M
Plugins step : 
Host estimator.

M
Plugins step:
anomaly detector.

M
checkstyle
add database init files.

M
Merge pull request #80 from msimonin/addLCMetrics

Add lc metrics