Remove unused JDBC Driver registration
Allow not having an init script
Require database file and add config tests
Use MVCC mode for higher concurrency
Remove URL settings that are set later on
Add missing config settings
Updated NEWS and CHANGES
Make DataSize and Duration json serializable
Update NEWS and CHANGES
[maven-release-plugin] prepare release 0.67
[maven-release-plugin] prepare for next development iteration
Fix HTTP tests on machines with many processors

The combination of an NIO connector and an insufficient number of threads
results in a server that hangs after accepting connections.  Previously,
TestingHttpServerModule was configuring a max of 10 threads, which is
insufficient for Jetty on machines with 32 processors.  This caused the
HTTP server to appear to hang after accepting a connection.

In addition to increasing the max thread count for tests based on the
available processor count, we also prevent the server from starting
if insufficient threads are detected after starting the HTTP server.
Remove legacy V1 event serialization
Make HTTP clients Closeable and use PreDestroy
Exclude unused asm from jersey-server in jaxrs
Do not create pretty-print JSON codecs by default
Update CHANGES
[maven-release-plugin] prepare release 0.68
[maven-release-plugin] prepare for next development iteration
Upgrade to jmxutils 1.13