LIBDRUM-317. Implement DataCiteXML based metadata mapping.

Copying EZIDIdentifierProvider.java for customization.

https://issues.umd.edu/browse/LIBDRUM-317
LIBDRUM-317. Implement DataCiteXML based metadata mapping.

Added DataCite_XML generation feature.

https://issues.umd.edu/browse/LIBDRUM-317
LIBDRUM-311. Configure metadata mapping for EZID DOI.

1. Enabled EZID module and configured it to use DIM2DataCite.xsl for metadata mapping
2. Removed unwanted metadata field mappings from DIM2DataCite.xsl

https://issues.umd.edu/browse/LIBDRUM-311
LIBDRUM-312. Create handle url to DOI target crosswalkTransform.

Implemented dc.identifier.uri to handle url transformation

https://issues.umd.edu/browse/LIBDRUM-312
LIBDRUM-318. Display DOI in default item page

Added configuration to display DOI

https://issues.umd.edu/browse/LIBDRUM-318