Mock 1.3.2

[Miroslav Suchý]

Hi,
I just released Mock 1.3.2. I build this one only for rawhide and F25.
To get more testers for the /usr/sbin move.

Additionally to 1.3.1 there are:
* --nocheck is working again
[GH#2](https://github.com/rpm-software-management/mock/issues/2)
* You can now run mock inside of Docker
[RHBZ#1336750](http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=1336750)
- however you need to run docker with `-cap-add=SYS_ADMIN`.
* When building for Fedora 25+ target in container, then buildhost is
set to name of host and not to name of container.
[RHBZ#1302040](http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=1302040)
  These are the new defaults:
```
## When RPM is build in container then build hostname is set to name of
## container. This sets the build hostname to name of container's host.
## Works only in F25+ chroots
# config_opts['use_container_host_hostname'] = True
## This works in F25+ chroots. This overrides
'use_container_host_hostname' option
# config_opts['macros']['%_buildhost'] = 'my.own.hostname'
```
* There was a lot of flake8/pep8/pycodestyle clean up of code.

Full release notes:
https://github.com/rpm-software-management/mock/wiki/Release-Notes-1.3.2

Mirek