where should we place parameters provider when create_catalog?

[FANNG1]

provider is used to create specify catalog like hiveCatalog. now it's hiding in CatalogCreateRequest.properties with key provider, should we place it in CatalogCreateRequest as the first level property?

class CatalogCreateRequest
{
   String name;
   Catalog.Type type;
   String comment;
   Map<String, String> properties;
}

cc @jerryshao

[FANNG1]

provider is placed in CatalogCreateRequest in #447

[jerryshao]

It is solved.