The current code is based on the Python sippy b2bua git commit:

    fe47443b3ace86b0994afef737d94633c88ee47a

The current code is based on the Python sippy b2bua git commit:

    84ff3a0fe3e806f2952aea05860e80e8dd7190c6

Update python b2bua commit version.
Update python b2bua commit version.
