Admission controller: logging improvements
Admission controller: logging improvements

Some of the less verbose debug information is now log level 2. Also improved
the debug message logged when a request comes in to make it easier to read.

Change-Id: I0ab96d12f94ee52910995d85328aa401a9c77a65
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1897
Reviewed-by: Nong Li <99a5e5f8f5911755b88e0b536d46aafa102bed41@cloudera.com>
Tested-by: jenkins
(cherry picked from commit ea101e4229f1743b4664932a91262a3b4cfdcbfe)
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1923
Reviewed-by: Matthew Jacobs <df2fa7c39d141dc5dc5589fed74180e757ed6c9a@cloudera.com>

michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala