Like voxpupuli#46, fix puppet/facter voxpupuli#45, but w/rpm

instead of yum and dpkg-query instead of `dpkg|awk`.

files/rundeck_version

@@ -1,3 +1,13 @@
-# Ask puppet what version of rundeck is installed.
-# Will return the version or if not available: "absent".
-puppet resource package rundeck | grep ensure | awk '{print $NF}' | sed "s/'//g;s/,//g"
+#!/bin/bash
+
+# dpkg-query will print "no packages found matching rundeck" on stderr if not installed, so
+# all that needs to be done is redirect stderr
+if $(command -v dpkg-query >/dev/null); then
+    dpkg-query -W -f 'rundeck_version=${Version}\n' rundeck 2>/dev/null
+fi
+
+# rpm will produce "package rundeck is not installed" on stdout if not installed, so you must
+# either silently check for existence or pipe the output to `grep -v`
+if $(command -v rpm >/dev/null && rpm --quiet -q rundeck); then
+    rpm -q --qf 'rundeck_version=%{VERSION}\n' rundeck
+fi