Reflected Aqua's converter refactoring (#933)

* reflect converter refactoring(#1061)

* fixed the sentences of the 2nd and 3rd tutorials

* fixed typo

* Add pyscf to azure build

* run them on the latest version of Qiskit

* updated kernel specs

* fixed styling issues

Co-authored-by: Paul Nation <nonhermitian@gmail.com>

Author: a-matsuo