Add minimum version requirement for six

Salt uses the function add_metaclass function which had a different name
prior to six version 1.4.0.

Signed-off-by: Skyler Berg <skyler.berg@huawei.com>
unit test case for groupadd
Access dictionary values correctly in salt.modules.mdadm.destroy Fixes #19115
Correctly convert command list into string and do not error if conf file missing. Fixes #19117
Redoing some changes
Fixing salt.modules.mdadm.create broken functionality
Fixing unit tests for mdadm
Lint fixes for key.py and utils/network.py
Merge branch 'six-version-requirement' of https://github.com/skylerberg/salt into skylerberg-six-version-requirement
Merge pull request #19140 from cachedout/dev_lint

Lint fixes for key.py and utils/network.py
remove six dep, we bundle it now
Merge pull request #19141 from thatch45/skylerberg-six-version-requirement

Merge #19101 with fixes
Increasing sleep to see if it fixes vt test
Merge pull request #19142 from cachedout/vt_test_sleep

Increasing sleep to see if it fixes vt test
Merge pull request #19116 from nmadhok/module-mdadm-destroy

Access dictionary values correctly in salt.modules.mdadm.destroy
Merge pull request #19120 from jayeshka/groupadd_unit_tests

unit test case for groupadd
Merge pull request #19121 from nmadhok/fix-mdadm-create-module

Fixing salt.modules.mdadm.create broken functionality