Fixed a few non deterministic tests

[yugvajani]

Description

This PR fixes three non deterministic tests :

• org.apache.iotdb.session.SessionCacheLeaderTest.testInsertTabletsWithSessionBroken
• org.apache.iotdb.commons.path.PathPatternTreeTest.testPathPatternTreeSplit
• org.apache.iotdb.confignode.persistence.schema.ConfigMTreeTest.testGetAllFileNamesByPath

These tests failed under NonDex tool as explained in the issue IOTDB-6352 .

Steps to Reproduce

To reproduce the problem, first build the module and then run the nondex command:

• For SessionCacheLeaderTest:

mvn install -pl iotdb-client/session -am -DskipTests

mvn -pl iotdb-client/session edu.illinois:nondex-maven-plugin:2.1.7:nondex -Dtest=org.apache.iotdb.session.SessionCacheLeaderTest#testInsertTabletsWithSessionBroken

The reason for the flakiness of this test is that HashMap does not guarantee the order of its entries. This unordered behaviour can lead to differences in the insertion or iteration order of the map. The fix involves replacing it with LinkedHashMap which guarantees the order.

• For PathPatternTreeTest:

mvn install -pl iotdb-core/node-commons -am -DskipTests

mvn -pl iotdb-core/node-commons edu.illinois:nondex-maven-plugin:2.1.7:nondex -Dtest=org.apache.iotdb.commons.path.PathPatternTreeTest#testPathPatternTreeSplit

The reason for the flakiness of this test is due to the order of the path returned by getAllPathPatterns function which gives a non deterministic order. The simple fix for this is to sort the output of getAllPathPatterns which will give a deterministic output.

• For ConfigMTreeTest:

mvn install -pl iotdb-core/confignode -am -DskipTests

mvn -pl iotdb-core/confignode edu.illinois:nondex-maven-plugin:2.1.7:nondex -Dtest=org.apache.iotdb.confignode.persistence.schema.ConfigMTreeTest#testGetAllFileNamesByPath

The reason for the flakiness of this test is due to the path returned by getBelongedDatabases function which gives a non deterministic order. The fix involves converting both the list to HashSet which makes the comparisions order independent.

Please let me know if you have any questions or need any additional justification/changes from my side.

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This PR has:

• been self-reviewed.
  • concurrent read
  • concurrent write
  • concurrent read and write
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods.
• added or updated version, license, or notice information
• added comments explaining the "why" and the intent of the code wherever would not be obvious
  for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold
  for code coverage.
• added integration tests.
• been tested in a test IoTDB cluster.

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Key changed/added classes (or packages if there are too many classes) in this PR

[github-actions]

Hi, this is your first pull request in IoTDB project. Thanks for your contribution! IoTDB will be better because of you.