c++11: stream output operators for stream types

c++11: stream output operators for stream types

stream output operators for the stream types are not part of the standard,
so this statement no longer works:

std::stringstream stream;
std::cout << stream;

instead, use the streambuf's stream operator:

std::cout << stream.rdbuf();

Signed-off-by: Casey Bodley <cbodley@redhat.com>