HPCC-10617 Add support for Cassandra

Added libuv and cpp-driver as submodules

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
HPCC-10617 Add support for Cassandra

Make sure that the required libraries are built and included in the package

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>