Simplifying send_keepalive test which won't compile on some STL implementations due to an issue with deque iterators.
Simplifying send_keepalive test which won't compile on some STL implementations due to an issue with deque iterators.

clemahieu/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks