clones a table in hbase. Optionally takes an array of strings that are the keys to create the splits on

hbase_clone_table.rb

def clone_table(old_table_name, new_table_name, split_keys=nil)
  admin = HBaseAdmin.new(HBaseConfiguration.new())
  td = admin.getTableDescriptor(old_table_name.to_java_bytes)
  td.setName(new_table_name.to_java_bytes)
  if split_keys.nil?
    admin.createTable(td)
  else
    new_keys = Java::byte[][split_keys.size].new
    split_keys.each_index {|i| new_keys[i] = split_keys[i].to_java_bytes}
    admin.createTable(td, new_keys)
  end
end