Add some [MS-DRSR] parts

[gpotter2]

• add enough of ms-drsr to perform a cracknames
• tests

[codecov]

Codecov Report

Attention: Patch coverage is 80.85106% with 9 lines in your changes missing coverage. Please review.

Project coverage is 81.61%. Comparing base (28287eb) to head (8ea4c87).

Files with missing lines	Patch %	Lines
scapy/layers/msrpce/msdrsr.py	0.00%	9 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4572   +/-   ##
=======================================
  Coverage   81.61%   81.61%           
=======================================
  Files         356      358    +2     
  Lines       85574    85621   +47     
=======================================
+ Hits        69837    69878   +41     
- Misses      15737    15743    +6     

Files with missing lines	Coverage Δ
scapy/layers/msrpce/all.py	88.23% <ø> (ø)
scapy/layers/msrpce/raw/ms_drsr.py	100.00% <100.00%> (ø)
scapy/layers/msrpce/msdrsr.py	0.00% <0.00%> (ø)

... and 6 files with indirect coverage changes