Check for exceptions after calling JNI FindClass

Change-Id: I493e22cc44013e3471107cbd4cae0b5c6210193e
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1889
Reviewed-by: Lenni Kuff <lskuff@cloudera.com>
Tested-by: jenkins
Admission controller: Pretty print bytes in mem over limit rejection message

Change-Id: I263c178319b9b2d2c9a608093d70494b179dc032
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1894
Reviewed-by: Matthew Jacobs <mj@cloudera.com>
Tested-by: jenkins
Admission controller: Fix exception message when llama-site cannot be found

We no longer look for files on the classpath, we just try to find the file
specified as it is.

Change-Id: I127f508ff6b91f671385985d32b7898b208ae2ed
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1895
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: jenkins