Metacat

Minor changes to MetacatHandler:
- Improved logging where MetaCatServlet.class was used in getLogger() rather than MetacatHandler.class (holdover from the refactor)
- Minor formatting changes, and replacement of 'MetaCatServlet' with 'MetacatHandler' in the logging output as needed.

improved multipart handling (improved logging messages, code, and error checking). Added exception classname to error output when the generic Exception is thrown. Added error check for cases of null value for file parts 'sysmeta' and 'object.'

added a few debugging lines in createSystemMetadata() related to contents of identifier strings

Modified IdentifierManager.getDocumentInfo() to include the docid in the returned hash map, since it is useful to be able to obtain the docid and rev separately from a given fullDocidWithRev (e.g. test.1.1).

fixing annoying error message inaccuracy

Changed AuthLDAP to deal with cases where getAttributes encounters non-string
attributes (which used to cause a ClassCastException). Now, if an attribute
value can not be cast to string, we catch the class cast exception and just
skip this value. This only typically occurs when an LDAP server is set to send...

MOdified MetacatHandler to catch cases where ObjectFormat is not being set properly on data files when
generating SystemMetadata. When the EML document contains a format for an entity that maps to a null
type in ObjectFormat.convert(), then the type ends up being null and an error is generated on insertion...

allow "docid override" queries to include the results of a "normal" query - if the operator is left null, it acts as the usual override, otherwise UNION and INTERSECT modes can be used to either augment or refine the results.
this is for incorporating semantic+spatial+keyword queries into one query operation/result

remove System.out statements in favor of logging

Removed hardcoded D1 node type in ResourceHandler and added in a new 'dataone.nodeType' property. Also added 'dataone.coordinatingNodeBaseURL' property which points to the CN that stores the authoritative object format list. If this instance of Metacat is a CN, it may point to itself.