add pyproject.toml for build dependency on setuptools

resolve tox error:

> ERROR: Can not execute setup.py since setuptools is not available in the build environment.

Fixes: https://tracker.ceph.com/issues/67986
Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit 9f29e0bec86e927689d61a3e33e2d938692085ad)

tox: fix whitespace error in passenv

> py: failed with pass_env values cannot contain whitespace, use comma to have multiple values in a single line, invalid values found 'PYTHONPATH RAGWEED_CONF RAGWEED_STAGES'

Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit b5d3e27a282244b6b46ff1e636acc4f683e9f777)

update output format of admin bucket check api

Signed-off-by: Cory Snyder <csnyder@1111systems.com>
(cherry picked from commit 8aac16be1436af80a7c8c62b0332dec5b6ebb9d7)

config: read_file() instead of deprecated readfp()

  ragweed/framework.py:385: DeprecationWarning: This method will be removed in future versions.  Use 'parser.read_file()' instead.
    cfg.readfp(f)

Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit 3b74aaef228abacc5ce880e4129d757eabd2de8a)

add tox.ini and update README

Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit 7a3645f271c5bff57a66e7980d59fd5b749eec6b)

remove bootstrap script

Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit 29d85b9de7179700f641760c897f0d36c11d947a)

remove nose imports

Signed-off-by: Casey Bodley <cbodley@redhat.com>

ragweed: switch to pytest framework

due to deprecation of nose

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>
(cherry picked from commit 8fedfb579fe2bca916922e9b33517ca3c7e1b824)

on ubuntu 20.04 the `python3-distro-info` package causes error

`Invalid version: '0.23ubuntu1' (package: distro-info)`
during bootstrap executing the command:
`./virtualenv/bin/python setup.py develop`

ref:
https://bugs.launchpad.net/ubuntu/+source/distro-info/+bug/1991606/comments/18

Fixes: https://tracker.ceph.com/issues/58549
Signed-off-by: mkogan <mkogan@ibm.com>
(cherry picked from commit 75f5a77dc667c6b0fc8964c85f2ee3344076783b)

rgw: ragweed: fix virtualenv error unrecognized argument --distribute

Fixes: https://tracker.ceph.com/issues/50553
Signed-off-by: Mark Kogan <mkogan@redhat.com>
(cherry picked from commit f514013dc1b03d3c4a8b4293ab5eb4b08fd6dee2)