Update for f29

In Fedora 29 dstat was merged with pcp-system-tools (see
https://pagure.io/fesco/issue/1956)

Work around a iscsi bug with external packages until we can get the
package fixed.

Obsolete F27

Change-Id: I2f16658c5a3e22cac70912a0f3ad65cdd7071a1e
diff --git a/files/rpms/dstat b/files/rpms/dstat
index 0d9da44..b058c27 100644
--- a/files/rpms/dstat
+++ b/files/rpms/dstat
@@ -1,2 +1,3 @@
-dstat
+dstat # not:f29
+pcp-system-tools # dist:f29
 python-psutil