Update NEWS to include jlents RPM change in 004.051

NEWS

-UNRELEASED
-
-    [rpm] Remove EL6 package requires of yum-plugin-downloadonly, since
-    yum-3.2.29-69 includes this plugin and obsoletes the individual
-    package (thus putting the puppet ensure in a loop) (jlent)
-
-release/004.051 (2015-07-24)
+release/004.051 (2015-07-27)
 
     [os] Small fix in base::os::debian to one of the systemd-related 
     syslog-filter regexes (akkornel)
@@ -12,6 +6,10 @@ release/004.051 (2015-07-24)
     [kerberos] Change the configuration for the WIN.SLAC.STANFORD.EDU domain, 
     as per Kent Reuber (see INC000003427399) (akkornel)
 
+    [rpm] Remove EL6 package requires of yum-plugin-downloadonly, since
+    yum-3.2.29-69 includes this plugin and obsoletes the individual
+    package (thus putting the puppet ensure in a loop) (jlent)
+
 release/004.050 (2015-07-24)
 
     [rpm] Making available openafs-1.6.{7,8}-EL{5,6,7}.repo files