Fix: kernel snapshot metadata handling and error paths

Signed-off-by: David Goulet <dgoulet@efficios.com>
fix ust output iterate

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
dont monitor UST streams in no_monitor channels

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
UST data snapshot working

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
fix ust monitor streams

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
local ust snapshot working

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
fix UST snapshot to relayd

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>