Description of problem: With bz#949617 as released with RHEL5.10, the CPU
socket information is now being reported to Satellite 5.6. However the socket
count using /proc/cpuinfo is not always correctly counted because the
"physical id" is not always a full ascending sequence.

Version-Release number of selected component (if applicable):
rhn-client-tools-0.4.20.1-6.el5

How reproducible:
Always but depends on the hardware

Steps to Reproduce:
1. Register a physical machine with multiple sockets, multi core RHEL5 machine
   against 5.6 Satellite, i.e. a 2 socket with 2 cores per cpu
2. Run rhn-profile-sync
3. Check the System -> Details -> Hardware

Actual results:
Sockets:    4
Cores:      4

Expected results:
Sockets:    2
Cores:      4


Additional info:
The '__get_number_sockets() function from
rhn-client-tools-0.4.20.1/src/up2date_client/hardware.py tries different
methods to determine the sockets count:
1. /usr/bin/lscpu
2. /proc/cpuinfo
3. /usr/sbin/dmidecode

On RHEL5, lscpu does not exist and falls back to searching the highest
"physical id" in /proc/cpuinfo:

 485     # Next try parsing /proc/cpuinfo
 486     if os.access("/proc/cpuinfo", os.R_OK):
 487         try:
 488             lines = open("/proc/cpuinfo", 'r').readlines()
 489             max_socket_index = -1
 490             for line in lines:
 491                 if 'physical id' in line:
 492                     socket_index = int(line.split(':')[1].strip())
 493                     if socket_index > max_socket_index:
 494                         max_socket_index = socket_index
 495             if max_socket_index > -1:
 496                 return 1 + max_socket_index
 497         except:
 498             pass


However this "physical id" is not fully sequential on all hardware. I.e. a
BL460G1 with two sockets and 2 cores / socket:

$ grep BL460 dmidecode 
	Product Name: ProLiant BL460c G1

$ grep "^physical id" proc/cpuinfo 
physical id	: 0
physical id	: 3
physical id	: 0
physical id	: 3