Shaded-client JARs

The new hadoop-client-api and hadoop-client-runtime artifacts have been added, as referred to by https://issues.apache.org/jira/browse/HADOOP-11804. These artifacts shade Hadoop's dependencies into a single JAR. As a result, it avoids leaking Hadoop's dependencies onto the application's classpath.

Hadoop now also supports integration with Microsoft Azure Data Lake and Aliyun Object Storage System as an alternative for Hadoop-compatible filesystems.