Metacat

Added support in ResourceHandler for the /formats collection. Added listFormats() and getFormat() method, both of which call CNCoreImpl methods to handle the call.

Updated CNCoreImpl to implement listFormats() and getFormat(), and changed calls to ObjectFormatCache in IdentifierManager, MetacatHandler to call getInstance(). Removed the ObjectFormatService registration from MetaCatServlet since it is replaced by CNCoreImpl.

add option for replicating system metadata (dataone)
https://redmine.dataone.org/issues/1626

use Data Manager Library to parse EML when needed in DataONE classes.
(augmented DML to parse data format elements in EML to estimate MIME type)
https://redmine.dataone.org/issues/1634

When calling SystemMetadata.getObjectFormat(), return the string value of the ObjectFormatIdentifier rather than ObjectFormat.toString() (which no longer returns the fmtid string).

When calling SystemMetadata.getObjectFormat(), return the value of the ObjectFormatIdentifier rather than ObjectFormat.toString() (which no longer returns the fmtid string).

organize imports so that it is clearer what dependencies exist on the D1 jars

include create() and reserveIdentifier() methods

include override annotation for register method

use Date not joda's DateTime