kernel-shark-qt: Free all collections when closing the trace file.

All data collections are file specific. We have to guarantee that
collections from one file cannot be used with another file.

Signed-off-by: Yordan Karadzhov <ykaradzhov@vmware.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed