Update JSONPointerTest for NonDex compatibility

[bmk15897]

Description

Flaky Test found using NonDex by running the command -
mvn edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=org.json.junit.JSONPointerTest#queryByEmptyKeySubObject

The logged failure for the org.json.junit.JSONPointerTest.queryByEmptyKeySubObject -

[ERROR] Failures: 
[ERROR]   JSONPointerTest.queryByEmptyKeySubObject:75 expected:<{"[":"empty key of an object with an empty key","subKey":"Some other value]"}> but was:<{"[subKey":"Some other value","":"empty key of an object with an empty key]"}>

Investigation

The test fails at JSONPointerTest.queryByEmptyKeySubObject:75 with a comparison error while comparing an expected string and the result from org.json.junit.JSONPointerTest.query function after converting it into String. The toString function of the Object class makes no guarantees as to the iteration order of the attributes in the object. This makes the test outcome non-deterministic and the test fails whenever the toString changes the order of the properties. To fix this, the expected and actual values should be checked in a more deterministic way so that the assertions do not fail.

Fix

Expected and Actual values can be converted into JSONObject and the similar can be used to compare these objects. As this function compares the values inside the JSONObjects without needing order, the test becomes deterministic and ensures that the flakiness from the test is removed.

The PR does not introduce a breaking change.

[stleary]

What problem does this code solve?
Fixes a unit test that is broken when running with Nondex

Risks
Low

Changes to the API?
N/A

Will this require a new release?
No

Should the documentation be updated?
No

Does it break the unit tests?
No

Was any code refactored in this commit?
N/A

Review status
APPROVED

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