Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to e790144fe2640e56715ce0912fb36ca70fb027b2
  - Merge "SO-CDS PNF BB"
  - SO-CDS PNF BB
    
    This commit implements code for PNF BB for pnf
    software upgrade usecase.
    
    Issue-ID: SO-2090
    Signed-off-by: tragait <rahul.tyagi@est.tech>
    Change-Id: I3da3ba965bc92fda0ecc542d42afe694f19e06e1
    Signed-off-by: tragait <rahul.tyagi@est.tech>
    
1 file changed