Implement PutClass and DeleteClass for WMI

[NtAlexio2]

This PR adds two most wanted PutClass and DeleteClass functions to wmi.py (issue #1186, this Reddit link, wmiexec-Pro project, ...) which unlocks many new features for wmi in future. The PR also includes:

• Add ObjectFlags constants referenced in MS-WMIO (2.2.6 ObjectFlags) to wmi.py file. It helps to easy debugging and code maintenance.
• Bug fix in CLASS_AND_METHODS_PART class to handle empty class names.

[NtAlexio2]

@anadrianmanrique Some updates on this PR. Please check <3

[XiaoliChan]

Wow, this is awesome!!!!

[NtAlexio2]

@anadrianmanrique When you get a chance, please review this PR — I’m pretty excited about these changes, they should make a real difference on WMI! 💪

[anadrianmanrique]

@NtAlexio2 thanks, yes, this PR has been already prioritized to be reviewed/tested in the context of 0.14-dev

[XiaoliChan]

@NtAlexio2 BTW, could you add the test case in https://github.com/fortra/impacket/blob/master/tests/SMB_RPC/test_wmi.py ?

[anadrianmanrique]

Hi @NtAlexio2, as @XiaoliChan pointed out, would it be possible to add tests cases coverage?

[NtAlexio2]

sure, I'll fix that asap

[NtAlexio2]

@anadrianmanrique done

[XiaoliChan]

@NtAlexio2 Man, this is awesome, will improve my wmiexec-Pro after this PR merged!

[anadrianmanrique]

I added a couple of cases in order to improve coverage of the changes.
@NtAlexio2 can you review that? Also I commented out in test_IWbemServices_PutClass_update_adds_property a test adding a UINT32 attribute as it wasn't passing ok. I that test correct? there could be a bug for that specific case?

Thanks