Oracle Data Pump Import imports no records
I suspect this may have something to do with you starting impdp as sysdba. Please see the note in http://docs.oracle.com/database/121/SUTIL/dp_export.htm#SUTIL824:

"Do not start Export as SYSDBA, except at the request of Oracle technical support. SYSDBA is used internally and has specialized functions; its behavior is not the same as for general users."

Try your command as system.