fix TFramedTransport residual continuation

There were many bugs in the current TFramedTransport.receiver caused by
merge mistakes and bad patches. Simplify the logic so it is easier to
reason about and prevent future issues.

- THRIFT-2194 Fixed one bug with residual not being set
- THRIFT-2205 Reverted the above fix (by accident) and broke it further
  by including InputBufferUnderrunError in TFramedTransport (which is
  incorrect)

This patch cleans up TFramedTransport.receiver by only have one hold
over buffer instead of two (frame + residual).