Split cluster agents in two

build.gradle

...java/fr/irit/smac/amas4dc/amas/DynamicClusteringAMAS.java

.../irit/smac/amas4dc/amas/DynamicClusteringEnvironment.java

...in/java/fr/irit/smac/amas4dc/amas/agent/ClusterAgent.java

.../java/fr/irit/smac/amas4dc/amas/agent/DataPointAgent.java

...mas4dc/amas/controller/AMAS4DCCommandAndQueryHandler.java

...rit/smac/amas4dc/amas/messages/EvaluatedScoreMessage.java

.../messages/InformCandidateSimilarClusterAgentsMessage.java

.../smac/amas4dc/amas/messages/RequestSimilarityMessage.java

src/main/java/fr/irit/smac/amas4dc/cluster/Cluster.java

...in/java/fr/irit/smac/amas4dc/cluster/ExtendedCluster.java

.../groovy/fr/irit/smac/amas4dc/amas/ClusterAgentTest.groovy