To create a profile in a container database ( affects all pluggable databases in the container )
SQL> CREATE PROFILE xxxxx LIMIT PASSWORD_REUSE_MAX 10
PASSWORD_REUSE_TIME 30 CONTAINER=ALL;
If you want to create a profile only for your pluggable database
SQL> CREATE PROFILE xxxxx LIMIT PASSWORD_REUSE_MAX 10
PASSWORD_REUSE_TIME 30 CONTAINER=CURRENT;
Keep in mind that in order to specify the CONTAINER clause, you must be connected to a multitenant container database (CDB). To specify CONTAINER = ALL, the current container must be the root. To specify CONTAINER = CURRENT, the current container must be a pluggable database (PDB).
Update
To drop the administrative user
SQL> alter session set "_oracle_script"=true;
SQL> drop user pp cascade;
Note
Be careful when dropping users this way. Some of the users might have been indeed created by scripts supplied by Oracle and might be needed for the components running inside that pluggable database.