Fix topics runtime classloader

[nicoloboschi]

Fixes this error

20:09:54.047 [main] INFO  a.l.runtime.agent.AgentRunnerStarter -- Error, NOW SLEEPING                                                  │
│ runtime org.apache.kafka.common.KafkaException: Failed to create new KafkaAdminClient                                                          │
│ runtime     at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:551)                                       │
│ runtime     at org.apache.kafka.clients.admin.Admin.create(Admin.java:144)                                                                     │
│ runtime     at org.apache.kafka.connect.util.TopicAdmin.<init>(TopicAdmin.java:282)                                                            │
│ runtime     at ai.langstream.kafka.runner.KafkaTopicConnectionsRuntime$1.start(KafkaTopicConnectionsRuntime.java:147)                          │
│ runtime     at ai.langstream.runtime.agent.AgentRunner.runJavaAgent(AgentRunner.java:374)                                                      │
│ runtime     at ai.langstream.runtime.agent.AgentRunner.run(AgentRunner.java:190)                                                               │
│ runtime     at ai.langstream.runtime.agent.AgentRunnerStarter.start(AgentRunnerStarter.java:111)                                               │
│ runtime     at ai.langstream.runtime.agent.AgentRunnerStarter.main(AgentRunnerStarter.java:53)                                                 │
│ runtime     at ai.langstream.runtime.Main.main(Main.java:42)                                                                                   │
│ runtime Caused by: org.apache.kafka.common.KafkaException: javax.security.auth.login.LoginException: No LoginModule found for org.apache.kafka │
│ .common.security.plain.PlainLoginModule                                                                                                        │
│ runtime     at org.apache.kafka.common.network.SaslChannelBuilder.configure(SaslChannelBuilder.java:184)                                       │
│ runtime     at org.apache.kafka.common.network.ChannelBuilders.create(ChannelBuilders.java:192)                                                │
│ runtime     at org.apache.kafka.common.network.ChannelBuilders.clientChannelBuilder(ChannelBuilders.java:81)                                   │
│ runtime     at org.apache.kafka.clients.ClientUtils.createChannelBuilder(ClientUtils.java:105)                                                 │
│ runtime     at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:522)                                       │
│ runtime     ... 8 common frames omitted