Update CHANGELOG and metadata for version 1.0.2

CHANGELOG

+* Sat Feb 01 2015 Stefan Schulte <stefan.schulte@taunusstein.net> 1.0.2
+- Add SLES and CentOS as supported operating systems (thanks to Michael Moll
+  and Gene Liverman for testing)
+- If the source parameter specifies a local file that you also manage
+  through a puppet file resource, the file resource will be autorequired
+  by the rpmkey resource (Thanks to duritong for implementing this)
 * Thu Jan 22 2015 Stefan Schulte <stefan.schulte@taunusstein.net> 1.0.1
 - Update metadata.json with tested operating systems
 * Wed Jan 21 2015 Stefan Schulte <stefan.schulte@taunusstein.net> 1.0.0

metadata.json

 {
   "name": "stschulte-rpmkey",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "author": "stschulte",
   "summary": "Manage your RPM keyring through puppet",
   "license": "Apache-2.0",