Provide entity for "Research Project"

[qtamu]

The Research Project is a new Entity that may have an associated PDAC and may have any number of associated Datasets.

A Research Project Entity can have a "isPDACForProject" relationship to a PDAC.
A PDAC Entity can have an "isProjectAssignedtoPDAC" relationship to a Research Project.

A Research Project can have a "isDatasetProducedByProject" relationship to a Dataset.
A Dataset Entity can have a "isProjectThatProducedDataset" relationship to a Research Project.

These relationships should not affect existing PDAC to Dataset relationships.

In order to enable the ResearchProject Entity, add a to https://github.com/TAMULib/DSpace/blob/tamu-rdc-dspace-7_x/dspace/config/entities/relationship-types.xml.

Once the for ResearchProject is in the xml file, it must be enabled in DSpace by running this script:
https://wiki.lyrasis.org/display/DSDOC7x/Configurable+Entities#ConfigurableEntities-2.Importentitymodelintothedatabase