Fix: casparCG template transitions bug

[nytamin]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Bug fix.

CasparCG Templates doesn't actually support transitions, but we have code paths that support it (but apparently they are buggy).

• What is the current behavior? (You can also link to an open issue here)
  When playing a template object, and (accidentally) has set a transition for it, the template isn't played properly.
  (when stopped, a PLAY "empty" is sent, not a CG STOP)

• What is the new behavior (if this is a feature change)?
  CG PLAY and CG STOP are sent, as they should

• Other information:

TODO

• Verify that this is actually the right thing to do, and that templates actually does not and should not support transitions

[mint-dewit]

There is an edge case here when your template doesn't have an out transition and you want to do a fade out using the casparcg transitions