User Impersonation fails on setting hive_conf_list in hive interpreter (JDBC)

This is how a sample jdbc:hive2://<host1>:<port1>,<host2>:<port2>/dbName;initFile=<file>;sess_var_list?hive_conf_list#hive_var_list looks like. And when "hive_conf_list" is set then, User Impersonation which is passed via "sess_var_list" fails.

Ref: https://cwiki.apache.org/confluence/display/Hive/HiveServer2+Clients#HiveServer2Clients-ConnectionURLFormat