Metacat

Updated the build to properly locate the servlet jar depending on which
version of tomcat is being used, tomcat5 or tomcat6.

when looking up group membership, skip referrals that have errors
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=4900

skip referrals that have errors (connection timeout, host down, etc)
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=4900

Refactored putObject method to separate the create() and update() portions in order to match the method signatures needed for DataONE.

Modified ResourceHandler.deleteObject() to take a globally unique id (guid)
as input rather than a metacat-conformant docid. The guid is translated
into a metacat docid which is then used in the handleDelete() call. So now
Metacat supports use of arbitrary identifiers for delete operations, but...

Added support to ResourceHandler to allow the putObject method to use
arbitrary guid strings as input. These strings are examined, and if they
match the Metacat docid format (scope.id.rev), they are used directly. If
the id is a string in another format, a new localId is generated based on...

Adding a new property to be used as an identifier prefix by default.

Updated MetacatRestClientTest so that the tests are actually calling fail()
when errors occur, and fixed all sixteen tests so that they run successfully
and can be run from any client (i.e., they don't depend on particular
documents being present in Metacat). The 'restfiles' directory can probably ...

Fixed bug in getNextRevision() where "error" documents were not being
detected properly before searching for the next identifier.

Added initial support for arbitrary string identifiers in metacat (referred to as a guid). The new identifier table is used to map arbitrary string identifiers to Metacat's current docid format (referred to as the localId). Added a new IdentifierManager class to manage this table, adding new mappings as objects are added to the system. Modified the MetacatTest service to utilize this mapping table to look up a localId from a guid. IdentiferManagerTest is working with these guids now, as is the MetacatTest service get() method, but other parts of the system are unaware of them (e.g., create, update, delete operations are unaware, and no mapping is created when new documents are created). As a consequence, the MetacatRestClientTest is not working (although it also had lots of hardcoded dependencies that need to be fixed as well).