suse platform: read /etc/SuSE-release only once.

doing it twice is (slightly) inefficient and complicates the tests
[OHAI-339] distinguish openSUSE from SUSE Linux Enterprise

- platform_family: stays "suse" for both
- platform: SLE, being the more stable platform,
                 gets to keep platform "suse"
            openSUSE is now platform "opensuse"
- platform_version: is "MAJOR.MINOR" even for SLE which officially is
                    versioned as "MAJOR [SP MINOR]"

I considered to change the platform only for *future* openSUSE
versions (12.3 or later) but decided against it: "suse" >= 12 would
then conflict with a future SLE 12 (scheduled for 2014).
[OHAI-536] Turn down ip6address logging to debug
Prevents fe80:: link-local address from becoming ip6address (seems to fix OHAI-467)
Add new CPU attributes for OS X to match those of Linux
Update darwin tests for the new attributes
rackspace private network discovery
Handle `hostname --fqdn` stupidity
Merge pull request #294 from jaymzh/hostnamefix_7

Handle `hostname --fqdn` stupidity
Merge branch 'OHAI-339' of github.com:mvidner/ohai

Conflicts:
	lib/ohai/plugins/linux/platform.rb
	spec/unit/plugins/linux/platform_spec.rb
Fix the broken tests post merge.
Contribution info for OHAI-339.
Merge pull request #299 from opscode/OHAI-339

OHAI-339: platform "suse" confuses openSUSE and SUSE Linux Enterprise
Contribution info for OHAI-497.
Merge pull request #233 from tas50/OHAI-497

[OHAI-497] Add additional cpu information to darwin, matching what we gather on linux
Contribution info for OHAI-536.
Merge pull request #234 from juliandunn/OHAI-536

[OHAI-536] Turn down ip6address logging to debug
Contribution info for OHAI-467.
Merge pull request #244 from mpasternacki/OHAI-467

[OHAI-467] Prevents fe80:: link-local address from becoming ip6address
Contribution info for OHAI-461.