Remove graph.dot label to be compatible with original boost lib.
Remove graph.dot label to be compatible with original boost lib.

Change-Id: Ia018c82861305b8e2a64d3c061f3cf0cb03fce97

giosalv/526-aladdin,giosalv/526-aladdin,giosalv/526-aladdin,giosalv/526-aladdin