Metacat

Added classes for basic event logging support. These classes write log entries to the database connection. Still to do: query the event log, write oracle sql code (postgres is done), possibly allow the log to be archived to a text file, and possibly do the dtabase writes asynchronously via a caching mechanism.

Added a simple action for finding out the current metacat version. The information is pulled from the property file, so be sure to update the version in the property file before shipping a release.

Changed printAttributeQuery() to no longer depend on the xml_index table. Now, if useXMLIndex is false, the method will use a recursive query on xml_nodes to match paths instead of using xml_index.

Created new printExtendedSQL function that can get the extended
return fields using only xml_nodes and not xml_index. One
step closer to eliminating the dependence ofn xml_index.

Created test class QuerySpecificationTest and started process of removing the xml_index from the QuerySpecification code. Reformatted some classes for readability.

Added more debugging messgaes to the test in an attempt to find out
what is wrong with the cookies.

Updated more tests on session reuse. Made the http calls set the sessionid
explicitly rather than relying on cookies being passed around statically.
Still need to modify HttpMessage to get rid of the static cookie.

New versions of the Metacat client API that allow access to the sessionId
so that a session can be reused over several different instances.

Fixed the sessionId handling code to now properly return the sessionId
in the login response message. Updated junit tests to test this issue.

Modified metacat to now provide the session identifier in the response
xml message when a login is called. This has not been fully tested.
I removed the HttpMessage class from metacat in favor of using the version
of that class that is found in the utilities module. This may cause some...