Tests crash with LTTng error

[Gerry Boland]

On Xenial+overlay, creating a package I get:

 9/14 Test #10: ApplicationManager ...............***Exception: Other 0.27 sec
LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.

10/14 Test #9: Application, .....................***Exception: Other 0.27 sec
LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.

11/14 Test #11: General .......................... Passed 0.16 sec
      Start 13: SessionManager,
      Start 14: WindowManager
12/14 Test #12: SharedWakelock, ..................***Exception: Other 0.26 sec
QStandardPaths: XDG_RUNTIME_DIR points to non-existing path '/run/user/1000', please create it with 0700 permissions.
LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.

13/14 Test #13: SessionManager, ..................***Exception: Other 0.30 sec
LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.

14/14 Test #14: WindowManager ....................***Exception: Other 0.32 sec
LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.

64% tests passed, 5 tests failed out of 14