[YSQL] java unit test uses == for string comparison

[myang2021]

Jira Link: DB-12524

Description

boolean is_wait_on_conflict_concurrency_control = (enable_wait_queues == "true");

Based upon https://stackoverflow.com/questions/61024135/why-cant-we-use-instead-of-equals-methods-to-compare-string-objects

"==" compares Object references with each other and not their literal values. If both the variables point to same object, it will return true. So,

String s1 = new String("hello");
String s2 = new String("hello");
Here s1==s2, will return false as both are different objects.

When you use equals(), it will compare the literal values of the content and give its results.

So the test is not doing what it intended to do because is_wait_on_conflict_concurrency_control is false.

Issue Type

kind/bug

Warning: Please confirm that this issue does not contain any sensitive information

• I confirm this issue does not contain any sensitive information.