Fixes #223
Introduce VM instance id / Run relationship such that only a direct lookup is required
Introduce mediator to instance id set to create the relationship
Add missing assert for setting run uuid in vm object
The run id is added in the Vm object if there is a mapping for it.
Process special value for runtimeparameters updated from a connector.
Merge branch 'master' into feature/vms-runs-optimization
Only store the runtime parameter uri and retrieve the object separately
@OneToOne optional = true doesn't work, so we load it on first get
Merge branch 'feature/vms-runs-optimization' of github.com:slipstream/SlipStreamServer into feature/vms-runs-optimization
Bugfix.
Fixed a bug where a RuntimeParameter can be considered as Set if his value is null.
Bugfixes around VmRuntimeParameterMapping.
Removed some methods that became useless.
Merge pull request #224 from slipstream/feature/vms-runs-optimization

Fixed #223 : Performance degrades with large deployment