Improve sap instance parsing to use the hostname to get the fields

[arbulu89]

Improve the sap instance parsing to use the hostname as another filtering value. This way, we don't only use the instance number to find the correct instance.

We can get the instance hostname from sapcontrol properties:

{
  "value": "sapnwdpas",
  "property": "SAPLOCALHOST",
  "propertytype": "Attribute"
},

This fixes strange deployments like this one, where we have 2 instances with the same instance number:

New issue saying to create a E2E test scenario with this data:
#474