Disable the tst_exceptionsafety_others test completely.

Disable the tst_exceptionsafety_others test completely.

QObject is no longer exception-safe and there's no one working on
improving this, so let's not block innocent commits because of this
failure.

QObjectPrivate's constructor initialises the
QObjectPrivate::threadData member to null, but the destructor
dereferences it unconditionally (the member is initialised in the
QObject constructor). That means QObjectPrivate is not exception-safe
by any definition and, so, anything depending on QObject is not
exception-safe.

Change-Id: If9d5004630b7ce2fb357e328627794caad67564f
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>