Introduce cache of default schemas to FakeResolver

[RVRhub]

Creating a Schema object from the FakeForSchema annotation can be time-consuming, as it involves reflection, when generating more than one object with a default schema using BaseFaker.populate(MyClass.class), the cache could increase significantly speed. The difference in speed is about 35%.
This pr solves this problem:

Before
Benchmark                                                 Mode  Cnt    Score    Error  Units
Datafaker_JavaObjectPopulateBenchmark.javaObjectPopulate  avgt   10  845.517 ± 56.535  ms/op

VS

After
Benchmark                                                 Mode  Cnt    Score    Error  Units
Datafaker_JavaObjectPopulateBenchmark.javaObjectPopulate  avgt   10  552.060 ± 25.132  ms/op