Check Oracle Software installed on server

[raffaelloferrari]

Is your feature request related to a problem? Please describe.
When all Oracle database are down on server, ercole can't retrieve number of licenses.
Oracle licensing says that if sofware of Oracle database are installed on server you need to pay license.

Describe the solution you'd like
Every Oracle home software have file called ConfigXML. We can check it.

Describe alternatives you've considered
None

Additional context
To obtain Oracle home we can do:
find / -name ConfigXML 2> /dev/null | awk -F "inventory" '{print $1}' | sort -u