[backport 2.13] increase the wait timeout to fetch the master key (#3151) (#3178)

[jngz-es]

• increase the wait timeout to fetch the master key

• fix UTs

Description

[Describe what this change achieves]

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[ylwu-amzn]

 D:\a\ml-commons\ml-commons\ml-algorithms\src\test\java\org\opensearch\ml\engine\encryptor\EncryptorImplTest.java:132: error: cannot find symbol

        exceptionRule.expect(MLException.class);
> Task :opensearch-ml-algorithms:compileTestJava
                             ^
  symbol:   class MLException
  location: class EncryptorImplTest
D:\a\ml-commons\ml-commons\ml-algorithms\src\test\java\org\opensearch\ml\engine\encryptor\EncryptorImplTest.java:166: error: cannot find symbol
        exceptionRule.expect(MLException.class);

[mingshl]

rerunning ITs