Log Message:
Update ruby-specinfra to 2.71.2.

2.71.2 (2017/9/7)

* fix freebsd service check
* correct spelling mistake

2.71.1 (2017/8/31)

* Allow to test main package version on Alpine Linux
* get_version returns malformed value if the package name contains a hyphen

2.71.0 (2017/8/26)

* Allow to switch backends

2.70.2 (2017/8/26)

* Updated suse.rb to detect OS info on SUSE 11 machine

2.70.1 (2017/8/2)

* Fix freebsd commands

2.70.0 (2017/7/25)

* Add jexec backend to support FreeBSD jail.
* Facter/Ohai support for host_inventory

2.69.0 (2017/7/14)

* Support Debian 9