fix(install): Replace platform.dist with distro.linux_distribution for PY3.8+ compatibility

[nikunj1222]

Replace platform.dist() with distro.linux_distribution in install.py | platform.dist() not supported by python3.8

Distro Information (Required)

Python >= 3.5
Ubuntu 20.04 LTS
And for all new distros in future

Possible Solution

To replace Replace platform.dist() with distro.linux_distribution in install.py

Use this module https://github.com/nir0s/distro for getting distro/system verion information.

Install distro module

`
Sudo pip install distro

`

[nikunj1222]

The do think now the failure is coming from other dependencies...?

[nikunj1222]

#1019 #1019

Should be merged to solved the errors on python 3.7,3.6,3.8

[nikunj1222]

#1016 #997
Above issues can be solved with this pull request.

[nikunj1222]

@Alchez @gavindsouza

Anybody has any idea why import module distro error ?

Traceback (most recent call last):
File "/home/travis/build/frappe/bench/install.py", line 24, in
install_and_import('distro')
File "/home/travis/build/frappe/bench/install.py", line 22, in install_and_import
globals()[package] = importlib.import_module(package)
File "/usr/lib/python2.7/importlib/init.py", line 37, in import_module
import(name)
ImportError: No module named distro

def install_and_import(package):
    import importlib
    try:
        importlib.import_module(package)
    except ImportError:
		subprocess.check_call('{0} -m pip install {1}'.format(sys.executable, package))
    finally:
        globals()[package] = importlib.import_module(package)

install_and_import('distro')

Normally this should not cause this error.

[gavindsouza]

Fix indentation and new lines!

[nikunj1222]

Hi guys it seems all checks are passed. Let me know if you need any more changes..

[gavindsouza]

@nikunj1222 sorry we couldn't get this fixed earlier. but #1048 has been merged. Thanks for your contribution.