[PSUPCLPL-15213]-Node_not_found_error_when_running_add_node_procedure

[nikhil1697]

Description

The issue is in the drain_nodes function where the condition if node_name in stdout incorrectly evaluates to true if node_name is a substring of one or more active node names in the cluster.
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Fixes # (PSUPCLPL-15213)

Solution

To address this issue, modified the condition to ensure that it checks for exact matches rather than substring matches. We can achieve this by splitting the stdout into lines and then checking if node_name exactly matches any line in the output.
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Test Cases

TestCase 1

Test Configuration:

Steps:

1. Run add node procedure with a node name which will be a substring of one or more active node names
   Example - There is already a node in the cluster with name test-worker-3-10 and then try to add a new node with name test-worker-3-1

Results:

Before	After
Procedure fails with error Error from server (NotFound): nodes "test-worker-3-1" not found	Procedure succeeds

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Integration CI passed
• Unit tests. If Yes list of new/changed tests with brief description
• There is no merge conflicts

Unit tests

Indicate new or changed unit tests and what they do, if any.