As part of a broader effort to decouple java driver code from the
server code, this moves sstableloader to its own tools directory.
As sstableloader is also used as a library (CASSANDRA-10637), added
a new artifact 'cassandra-sstableloader' that will get deployed to
maven along with 'cassandra-all'.
While I expect this is likely a niche use case, this will allow users
to continue using BulkExport as a library.
Moves sstableloader-specific targets to its own build.xml in
tools/sstableloader/build.xml.
Also updates IDE project files and circleci to utilize new
sstableloader-specific targets.
patch by Andy Tolbert; reviewed by Stefan Miklosovic and Mick Semb Wever for CASSANDRA-20328
Stefan Miklosovic