Making salt.log.__init__ python3 compatible
Making salt.log.mixins python3 compatible
Merge pull request #17743 from nmadhok/log-python3-mixins

Making salt.log.mixins python3 compatible
replace salt._compat.string_types with six.string_types
Merge pull request #17745 from nmadhok/log-python3-__init__

Making salt.log.__init__ python3 compatible
Merge pull request #17704 from hulu/_compat-string_types

replace salt._compat.string_types with six.string_types
Merge branch 'develop' into with-pylint-pragmas