Add support for expanding values/data in matched registry subkey assertions

[atc0005]

When testing the check_reboot plugin on a Windows Server 2012 R2 box this status was continually shown:

WARNING: Reboot needed (applied 15 reboot assertions, 1 matched)

**ERRORS**

* reboot assertions matched, reboot needed

**DETAILED INFO**


Summary:

- 15 total reboot assertions applied
- 1 total reboot assertions matched

--------------------------------------------------

Reboot required because:


- Subkeys for key HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\WindowsUpdate\\Services\\Pending found

Once I logged into the box and checked I found that the subkey was:

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Services\Pending\117cab2d-82b1-4b5a-a08c-4d62dbee7782

and with these values set:

Name	Type	Data
ClientApplicationID	REG_SZ	Service Recovery
RegisterWithAU	REG_DWORD	0x1

I do not yet know why Service Recovery is set and is not cleared on restart, but having this additional data available via Nagios would be useful at a glance. Gating it behind the --verbose flag would be the plan.