* Fixing java:S3599 - Avoid double brace initializer

Because Double Brace Initialization (DBI) creates an anonymous class with a
reference to the instance of the owning object, its use can lead to memory
leaks if the anonymous inner class is returned and held by other objects. Even
when there's no leak, DBI is so obscure that it's bound to confuse most
maintainers.

* Fix incorrect List.contains typed check

* Avoid potential NPE in DefaultCodegen

* [fsharp] Remove unused boolean and log

* Fix potential NPE in Haskell http client

* Fix potential bugs in JavaCXFExtServerCodegen, found by static analysis

…ppedModels (#7471)

Co-authored-by: Thomas Beckmann <[email protected]>

Add a link to react native tutorial

* Support server configuration per operation

* regenerated+tests

* base_url fix

* support not templated urls

* revert update of ruby docs

* add option to set recursion limit

* fix test failure

* update doc

* add tests

* add missing import

* rename option to recursionLimit