Check the strategy requirements

Running of strategy requires different type of data resources to compute a solution. During the strategies loading, the decision engine should automatically check if all requirements are achieved :

. Do the metering service is reachable ?
. Has the data model, used by the strategy, been loaded ?
. Have all actions, which can be included in a solution built by the strategy, been loaded ?
. Is the scoring service reachable ?
...

If one requirement is not achieved, the cloud admin should not be able to use the strategy to audit the cluster (an indicator on CLI and dashboard should be used to notify the admin)