Metacat

When calling SystemMetadata.getObjectFormat(), return the string 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

Merged in the D1_0_6_2_BRANCH changes that include the transition from ObjectFormat calls to ObjectFormatCache calls.

include GUID column for xml_access and related methods for storing/retrieving access rules

handle timed replication of system metadata. there are still a few outstanding issues:
-track server location of system metadata-only entries
-replication policy flag for system metadata-only entries?
-locking for replicated entries?
-forced replication of entries

-remove system metadata guid -> local id mapping (there is no document for system metadata now)
-include system metadata elements when replicating data objects (TODO: transfer all system metadata structures with the docinfo request).
TODO: remove docid+rev from the systemMetadata table definition

do not use XML files for storing SystemMetadata - use DB tables only.

Commenting out these MetacatRestClient tests because the Metacat RestService is no longer registered as a servlet and needs to be removed, along with the associated MetacatRestClient and tests.

Fixed MetaCatServletTest test failures by removing the hardcoded username/passwords used in the tests and replacing those with data from metacat.properties.

Fix AuthLdapTest to use accounts that are more reliable when searching for existing accounts in the getPrincipals output.