Currently in dcmihandler object path for PCAP_INTERFACE  is hardcoded to get settings service. It was discussed earlier in this review that this needs to be more dynamic. 

Currently I have 2 options to resolve this:

1. instead of getting a specific service with a hardcoded path, set/getPcap should call getAllDbusObjects. This will give an object tree and we have to iterate through all the objects implementing the powercap interface. I am not sure if this is safe to do so. Need input from the maintainers.

2. Another option is to add a compile time flag to select a path.

Please let me know what you think.
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Thanks,