Fix for a failing upgrade test

[stan-is-hate]

Previous PR (#6938) added partial support for named listeners to kafka.py. Though we did run full test suite, somehow we missed one of the upgrade tests.
Since upgrade tests start kafka from older versions, they may try to start it from a version that doesn't support named listeners yet.
This PR addresses the issue by adding a method to version.py called supports_named_listeners() and calling that method from kafka.properties template.
According to KIP-103 (KAFKA-4636), inter.broker.listener.name property was introduced in 0.10.2.0, so I used this value in supports_named_listeners() method.

Testing:
Verified that a previously failing test passes locally.
Ran upgrade tests on Jenkins - https://jenkins.confluent.io/job/system-test-kafka-branch-builder/2747, all green

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[stan-is-hate]

@rajinisivaram @brianbushree @ijuma can you please help review this PR? Please let me know if we need a full test run for it

[stan-is-hate]

@mumrah

[brianbushree]

if these kafka versions don't support named listeners, can we still use use_separate_interbroker_listener parameter? will that have no effect? or what will happen exactly?

[stan-is-hate]

@brianbushree good question.
If kafka version doesn't support named listeners, this param should be ignored really. Let me make the change.

[stan-is-hate]

@brianbushree I suggest the following change in kafka.py:

    def get_lowest_version(self):
        return min(node.version for node in self.nodes)

    def setup_interbroker_listener(self, security_protocol, use_separate_listener=False):
        self.use_separate_interbroker_listener = self.get_lowest_version().supports_named_listeners \
                                                 and use_separate_listener
        ....

This way the only way people can get into the state where their node is running a version that doesn't support named listeners (< 0.10.2.0) but at the same time kafka is using a named listener (use_separate_interbroker_listener == True) is if they set use_separate_interbroker_listener=True in constructor and after that call smth like self.kafka.nodes[0].version = V_0_9_2_0. We cannot really hook into a setter for node.version but I don't think it will be a huge issue - I would expect people setting different versions on different nodes to know what they're doing.
What do you think?

[rajinisivaram]

@stan-confluent Thanks for the PR, LGTM

[brianbushree]

@stan-confluent makes sense, LGTM!

[rajinisivaram]

@stan-confluent Thanks for the PR, merging to trunk.

[hachikuji]

LGTM. Thanks for the patch!