Support checked exceptions that can be defined in responses

[jsenko]

Example:

 "paths": {
    "/api/serviceregistry_mgmt/v1/registries": {
      "description": "Manage the list of all Registry instances",
      "post": {
        "operationId": "createRegistry",
        "responses": {
          "409": {
            "x-checked-exceptions": [
              "org.bf2.srs.fleetmanager.common.storage.RegistryStorageConflictException",
              "org.bf2.srs.fleetmanager.spi.ams.ResourceLimitReachedException",
              "org.bf2.srs.fleetmanager.spi.ams.TermsRequiredException",
              "org.bf2.srs.fleetmanager.common.storage.RegistryStorageConflictException",
              (...)
            ]
          },
          "500": {
            "x-checked-exceptions": [
              "org.bf2.srs.fleetmanager.spi.ams.AccountManagementServiceException"            
            ]
          }
        }
      }
  }

It could possibly generate an exception mapper as well, if configured.