[java] Deprecate max-threads flag. Add an alternate flag in the distributor for new session thread pool size. #10995
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Description
Related to #10332.
Motivation and Context
The "max-threads" flag was intended to be used in the Distributor and this was mainly used in Grid 3. However, in Grid 4, the flag's value is not actually being used. So "max-threads" is deprecated and will be removed minimum 2 versions later. As an alternative, a new flag is added to the distributor whose value is used in the code base.
The new session creation thread pool size affects the Distributor's ability to create sessions parallel. In most cases, the default thread pool size should be sufficient. But in a large grid, it might be beneficial for the user to set its value as required. Thus, making the thread pool size configurable.
Types of changes
Checklist