node.nodetool should use node's IP, not localhost

```
def nodetool(self, cmd, capture_output=True):
env = common.make_cassandra_env(self.get_install_cassandra_root(), self.get_node_cassandra_root())
nodetool = self.get_tool('nodetool')
args = [nodetool, '-h', 'localhost', '-p', str(self.jmx_port)]
```

Start at the node.nodetool method shown in the issue and inspect how the node's IP address is exposed. Verify the command uses that address instead of localhost while preserving the existing JMX port, then run the relevant project tests or a nodetool invocation against a managed node.

Written by the indexing model from the issue text.