Fix fault-monitor interfacesAdded msg parsing

With the latest sdbusplus exception handling changes,
an exception was being thrown when trying to read a pair
out of the interfacesAdded signal message.

Change the code to read the path and map separately.

Also modified the name of the data structures to match
what the message actually returned.

Tested:  The exception journal entries went away and LEDs
         will turn on and off again.

Change-Id: I2c72000e0da365743715da966a0c9e571efd33d5
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed