graphtools: added multi graph support for the shard. Now different graphs with different ids can be created
graphtools: added multi graph support for the shard. Now different graphs with different ids can be created

SpaceAppsXploration/rdfendpoints,SpaceAppsXploration/rdfendpoints,SpaceAppsXploration/semantic-data-chronos,SpaceAppsXploration/semantic-data-chronos,Mec-iS/semantic-data-chronos,SpaceAppsXploration/rdfendpoints,Mec-iS/semantic-data-chronos,SpaceAppsXploration/semantic-data-chronos,Mec-iS/semantic-data-chronos