Remove exception handling in main function.
1. PCIeBifurcation::populatePCIeBifurcationData is not throwing
exception now. Avoid handling exception in main function and check
for SUCCESS/FAILURE.
2. Update the sample config json file in the comment.
Testing: Binary files are generated successfully with the change in
QEMU. Unit tests successful.
Change-Id: I11864dc14c88f33be6c9311f3c07ed028365e41b
Signed-off-by: Vamsy Krishna Nooney <vamsykn@google.com>