Switch `__grains__['os']` check with `salt.utils.is_windows()`
Fix PyLint C0103 on `salt.version`. Refs #1775.
Fix PyLint C0103 on `salt.state`. Refs #1775.
Fix PyLint C0103 on `salt.template`. Refs #1775.
Fix PyLint C0103 on `salt.payload`. Refs #1775.
Fix PyLint C0103 on `salt.log`. Refs #1775.
Fix PyLint C0103 on `salt._compat`. Refs #1775.
Fix PyLint C0103 on `salt.client`. Refs #1775.
Fix PyLint C0103 on `salt.config`. Refs #1775.
Fix PyLint C0103 on `salt.crypt`. Refs #1775.
Fix PyLint C0103 on `salt.minion`. Refs #1775.
Fix PyLint C0103 on `salt.master`. Refs #1775.
Fix PyLint C0103 on `salt.loader`. Refs #1775.
Fix PyLint C0103 on `salt.fileclient`. Refs #1775.
Fix PyLint C0103 on `salt.auth.ldap` and also `.format()`. Refs #1775.
Fix PyLint C0103 on `salt.modules.apache`. Refs #1775.
Fix PyLint C0103 on `salt.modules.debconfmod`. Refs #1775.
Fix PyLint C0103 on `salt.modules.file`. Refs #1775.
Fix PyLint C0103 on `salt.modules.freebsd_sysctl`. Refs #1775.
Fix PyLint C0103 on `salt.modules.gem`. Refs #1775.