__qualname__ for methods

The __qualname__ attribute for methods created using pybind11 seems to be not consistent with that created by cpython.
Testing Repo: https://github.com/m-chaturvedi/reproduce_issues/tree/master/pybind_qualname
Related to #1171 via @jagerman .
PEP: https://www.python.org/dev/peps/pep-3155/

$  /bin/cat main.py
#!/usr/bin/python3
# Tested with python 3.7

import python_module
import pybind_module
from pprint import pprint

if __name__ == "__main__":
    assert python_module.Pet.get_data.__qualname__ == "Pet.get_data"
    assert python_module.Pet.__init__.__qualname__ == "Pet.__init__"

    assert pybind_module.Pet.get_data.__qualname__ == "PyCapsule.get_data"
    assert pybind_module.Pet.__init__.__qualname__ == "PyCapsule.__init__"

$  /bin/cat main.cpp
#include <pybind11/pybind11.h>
#include <iostream>
namespace py = pybind11;

class Pet {
 public:
        Pet() {
            c = 10;
        }
        ~Pet() {}
        int get_data() {
            return c;
        }

 private:
        int c;
};


PYBIND11_MODULE(pybind_module, m) {
    using rvp = pybind11::return_value_policy;
    py::class_<Pet>(m, "Pet")
        .def(py::init<>())
        .def("get_data", &Pet::get_data);
}

$  /bin/cat python_module.py

class Pet(object):

    def __init__(self):
        pass

    def get_data(self):
        return 10

$  /bin/cat CMakeLists.txt
cmake_minimum_required(VERSION 2.8.5)
project(test_pybind11 CXX)

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# Tested with python 3.7
set(PATH_TO_PYBIND /home/chaturvedi/workspace/pybind11/build_master_ninja/install/share/cmake/pybind11)
# IMPORT pybind11
find_package(pybind11 REQUIRED CONFIG PATHS ${PATH_TO_PYBIND})

configure_file(main.py ${CMAKE_BINARY_DIR} COPYONLY)
configure_file(python_module.py ${CMAKE_BINARY_DIR} COPYONLY)
pybind11_add_module(pybind_module main.cpp)

Run the reproduction from the linked pybind_qualname repository with main.py, main.cpp, python_module.py, and CMakeLists.txt, then compare the reported qualname values with CPython. Read PEP 3155 and related issue #1171 first; done means methods created through pybind11 report the same qualified names as their CPython counterparts.