Add equals to reserved keywords and escape method names

[nogates]

What does this PR do?

Fix code generation for Java model attributes that conflict with reserved keywords and method names.

Changes

• Added equals to the list of reserved Java keywords
• Created escape_method_reserved_names() function to handle method name conflicts for getClass and setClass
• Updated model template to apply method name escaping to JSON property annotations

Additional Notes

Review checklist

Please check relevant items below:

• This PR includes all newly recorded cassettes for any modified tests.

• This PR does not rely on API client schema changes.

  • The CI should be fully passing.

• Or, this PR relies on API schema changes and this is a Draft PR that includes tests.

  • Note: CI shouldn't be run on this Draft PR, as its expected to fail without the corresponding schema changes.