Make LogReader only dump entries on VLOG(3)
Make LogReader only dump entries on VLOG(3)

LogReader dumps all entries on VLOG(1). While dumping all entries is
useful, VLOG(1) means it's unavoidable and a nuisance when debugging
other stuff. This increases the level to VLOG(3).

Change-Id: If3e68fd527e17c950375b7c927a9af729c8da992
Reviewed-on: http://gerrit.ent.cloudera.com:8080/793
Tested-by: jenkins
Reviewed-by: Matteo Bertozzi <1d5ca967930bde0bdce795acbf71a5e281d2d4e5@cloudera.com>

andrwng/kudu,andrwng/kudu,helifu/kudu,andrwng/kudu,andrwng/kudu,cloudera/kudu,helifu/kudu,cloudera/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,InspurUSA/kudu,andrwng/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,andrwng/kudu,helifu/kudu,cloudera/kudu,InspurUSA/kudu,InspurUSA/kudu,cloudera/kudu,helifu/kudu,helifu/kudu,helifu/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,cloudera/kudu,helifu/kudu,EvilMcJerkface/kudu,helifu/kudu,helifu/kudu,EvilMcJerkface/kudu,andrwng/kudu,andrwng/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,cloudera/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,cloudera/kudu,InspurUSA/kudu,cloudera/kudu,andrwng/kudu,cloudera/kudu,InspurUSA/kudu,EvilMcJerkface/kudu