HADOOP-10886. CryptoCodec#getCodecclasses throws NPE when configurations not loaded. Contributed by Uma Maheswara Rao G.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/fs-encryption@1615523 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6814. Mistakenly dfs.namenode.list.encryption.zones.num.responses configured as boolean. Contributed by Uma Maheswara Rao G.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/fs-encryption@1615525 13f79535-47bb-0310-9956-ffa450edef68