MAPREDUCE-5070. TestClusterStatus.testClusterMetrics fails on JDK7. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1457033 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5072. TestDelegationTokenRenewal.testDTRenewal fails in MR1 on jdk7. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1457034 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5073. TestJobStatusPersistency.testPersistency fails on JDK7. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1457093 13f79535-47bb-0310-9956-ffa450edef68