Fix for flaky test AuthenticationTokenTest.equals

[219sansim]

Overview
The AuthenticationTokenTest.Equals fails because the token generated is not the same everytime. The JSONObject.toString() gives a non-deterministic output because because JSONObject values are unordered. The solution is to sort the key-value pairs of jsonHeader and jsonPayload before converting it to their string representation. I had to modify XsuaaTokenCompTest.java as it was affected by this change and had a failing test.
Command to reproduce the failure:
mvn -pl spring-security edu.illinois:nondex-maven-plugin:2.1.7-SNAPSHOT:nondex -Dtest=com.sap.cloud.security.spring.token.authentication.AuthenticationTokenTest#equals
Error Output:
The test fails on 3/5 iterations of the NonDex tool

 Results:
[INFO] 
[ERROR] Failures: 
[ERROR]   AuthenticationTokenTest.equals:40 expected: <AuthenticationToken [Principal=Jwt header
        {"alg":"RS256","kid":"default-kid-ias"}
Jwt payload
        {"exp":6974056800,"aud":"theClientId","scim_id":"the-user-id","app_tid":"the-app-tid","zone_uuid":"the-zone-id","user_uuid":"the-user-id","azp":"theClientId","cid":"theClientId"}
, Credentials=[PROTECTED], Authenticated=true, Details=null, Granted Authorities=[]]> but was: <AuthenticationToken [Principal=Jwt header
        {"kid":"default-kid-ias","alg":"RS256"}
Jwt payload
        {"aud":"theClientId","zone_uuid":"the-zone-id","exp":6974056800,"azp":"theClientId","cid":"theClientId","app_tid":"the-app-tid","scim_id":"the-user-id","user_uuid":"the-user-id"}
, Credentials=[PROTECTED], Authenticated=true, Details=null, Granted Authorities=[]]>
[INFO] 
[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0

Reason:
The org.json.JSONObject class uses Maps as the data structure for the JSONObject. And, according to HashMap documentation,
"This class makes no guarantees as to the order of the map; in particular, it does not guarantee that the order will remain constant over time."
This causes the jsonHeader.toString() and jsonPayload.toString() to give a non-deterministic output.
About Flaky Tests:
Flaky tests are tests in software development that produce inconsistent or unreliable results, which can lead to non-deterministic outcomes of the test case, fixing them is important to both reliable testing and fixing vulnerabilities in the code.

[cla-assistant]

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[liga-oz]

follow up PR was merged #1403