Fix missing containment in generic agent meta-model.

tools.descartes.prisma.agent.generic.edit/plugin.properties

...agent/provider/GenericAgentConfigurationItemProvider.java

...ric/genericagent/provider/RequiredObjectItemProvider.java

...ic/genericagent/presentation/GenericAgentModelWizard.java

...s.descartes.prisma.agent.generic/model/genericagent.ecore

...escartes.prisma.agent.generic/model/genericagent.genmodel

...agent/generic/genericagent/GenericAgentConfiguration.java

...risma/agent/generic/genericagent/GenericAgentPackage.java

...tes/prisma/agent/generic/genericagent/RequiredObject.java

...nt/generic/genericagent/impl/GenericAgentPackageImpl.java

...gent/generic/genericagent/impl/RequiredContainerImpl.java

...a/agent/generic/genericagent/impl/RequiredObjectImpl.java