Pass submission result to redux-form submit handler

[maxmalov]

Redux form can handle submission results returned by onSubmit handler, for example, https://redux-form.com/7.2.3/docs/api/reduxform.md/#-code-onsubmitsuccess-function-code-optional-

These changes propose passing a submission results to onSubmit handler

[afitiskin]

Finally, they fixed this! :) It was a workaround for redux-form version 6.

[afitiskin]

I will check this soon and if everything is ok I will merge your PR

[afitiskin]

Sorry, the problem with async validation is still exists in redux-form, so I can't merge this PR.
More info about the problem:

1. You need to have async validation in your form.
2. Async validation function should return promise (like routine does)
3. Async validation function should resolve promise with some data
4. Async validation will pass but submission of the form will be impossible

Resolving promise with some data is blocking form submission forever so using routines for async validation is impossible.

How to reproduce:

1. Clone https://github.com/afitiskin/redux-form
2. Checkout broken-async-validation-example
3. Go to redux-form/examples/brokenAsyncValidation
4. Make npm install && npm start
5. Fill the form and try to submit
6. You will see no effect, there is (index):1 Uncaught (in promise) You shall not pass! in console.

There is a bug report to redux-form, but it has been closed due to inactivity...

[afitiskin]

I submitted new bug report to redux-form: redux-form/redux-form#3895