Change logrotate configuration

With the revert commit 11e577f the Heka logrotate configuration inherits
from the main logrotate configuration. This means that the "su root
syslog" setting can be removed. And with logrotate being executed every
day using "hourly" in the Heka logrotate configuration doesn't make
sense anymore.
diff --git a/heka/files/heka_logrotate.conf b/heka/files/heka_logrotate.conf
index 2e290ad..9e35b33 100644
--- a/heka/files/heka_logrotate.conf
+++ b/heka/files/heka_logrotate.conf
@@ -12,10 +12,8 @@
   # number of rotated files to keep
   rotate 10
   # do not rotate files unless both size and time conditions are met
-  hourly
+  daily
   minsize 20M
   # force rotate if filesize exceeded 100M
   maxsize 100M
-  # this must map the /var/log directory group ownership
-  su root syslog
 }