test: update pci device names

Kernel pci id mapping has changed slightly, so unit tests were failing.

This is for 2.6.32-431.17.2.1chaos.ch5.2.x86_64 (Jim's TOSS desktop)

Jim
test: add Dell R920 test data (TOSS-2659)
dmi: handle memory reported in GB (TOSS-2659)