added deprecation warning to createdb() and dropdb() and added new functions create_tables() and drop_tables()
added deprecation warning to createdb() and dropdb() and added new functions create_tables() and drop_tables()

#2996

privacyidea/privacyidea,privacyidea/privacyidea,privacyidea/privacyidea,privacyidea/privacyidea,privacyidea/privacyidea,privacyidea/privacyidea