[chef] Logrotate v1.5.0

[Steven Danna < >]

Ohai Chefs,

I just released logrotate 1.5.0 which adds a number of parameters to
the logrotate_app definition.

Full release notes: 
https://github.com/stevendanna/logrotate/releases/tag/v1.5.0

I have also updated the contribution policy as contributing to this
cookbook will no longer require JIRA or a CLA.  Thanks to all of the
contributors:

Evan Gilman
Lloyd Philbrook
Maciej Galkiewicz
Seth Vargo
jkapusi
rlim

Cheers,

Steven