oradb-manage-db: Bugfix for oracle_db_instance_name in oratab and .profile
oradb-manage-db: Bugfix for oracle_db_instance_name in oratab and .profile

The implementation of db_homes_config broke the support for
oracle_db_instance_name in /etc/oratab and .profile. This has been fixed.

oravirt/ansible-oracle,ilspleno/ansible-oracle,oravirt/ansible-oracle,ilspleno/ansible-oracle