Story 2079, task 8093. Added maxLastModified attribute and grouped the attributes to CaomEntity and used it to extend ObsType, Artifact, Part, Chunk.
Story 2079, task 8093. Added maxLastModified attribute and grouped the attributes to CaomEntity and used it to extend ObsType, Artifact, Part, Chunk.

opencadc/caom2,opencadc/caom2,opencadc/caom2,opencadc/caom2