Add configuration property for KiteURIHandler

With KITE-476 we added the kite-data-oozie module that contains a KiteURIHandler for oozie. When testing on a kerberos cluster with an HA hive instance it became apparent that it was difficult to provide configuration to kite such as the metastore.uris or the kerberos specific configs.

A potential to make this easier would be to provide a configuration property similar to the one for the HCatURIHandler in oozie (https://issues.apache.org/jira/browse/OOZIE-1724) that adds hive-site.xml configuration specifically for the HCat handler.

Since the KiteURIHandler could potentially be used for more than just hive datasets it might be worthwhile to make this configuration more flexible with a comma separated list of configuration files to load for Kite.

For example:

<property>
  <name>oozie.kite.KiteURIHandler.configuration</name>
  <value>hive-conf/hive-site.xml,hdfs:///user/kite/conf/kafka-site.xml</value>
</property>

See https://groups.google.com/a/cloudera.org/forum/#!topic/cdk-dev/TnH_nNB5_As for initial discussion.