Move Seapilot from qpid::client to qpid::messaging API.

We need to do this because the qpid::client API is no longer supported
and is no longer part of QPID versions after 0.26.

Change-Id: I87c242b85dc9171a07b18c533f7a596d819a9fd1
Merge "Move Seapilot from qpid::client to qpid::messaging API."