Cleanup fdp code to use local root graph (argument to fdp_layout) for root tests.
Cleanup fdp code to use local root graph (argument to fdp_layout) for
root tests.

kbrock/graphviz,jho1965us/graphviz,jho1965us/graphviz,jho1965us/graphviz,kbrock/graphviz,BMJHayward/graphviz,tkelman/graphviz,pixelglow/graphviz,ellson/graphviz,tkelman/graphviz,pixelglow/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,kbrock/graphviz,kbrock/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,ellson/graphviz,BMJHayward/graphviz,tkelman/graphviz,BMJHayward/graphviz,pixelglow/graphviz,BMJHayward/graphviz,ellson/graphviz,pixelglow/graphviz,kbrock/graphviz,BMJHayward/graphviz,pixelglow/graphviz,BMJHayward/graphviz,kbrock/graphviz,BMJHayward/graphviz,pixelglow/graphviz,jho1965us/graphviz,kbrock/graphviz,MjAbuz/graphviz,jho1965us/graphviz,MjAbuz/graphviz,jho1965us/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,jho1965us/graphviz,kbrock/graphviz,jho1965us/graphviz,tkelman/graphviz,kbrock/graphviz,tkelman/graphviz,pixelglow/graphviz,BMJHayward/graphviz,ellson/graphviz,jho1965us/graphviz,kbrock/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,pixelglow/graphviz,pixelglow/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,jho1965us/graphviz,MjAbuz/graphviz,tkelman/graphviz,tkelman/graphviz,ellson/graphviz,jho1965us/graphviz,MjAbuz/graphviz,ellson/graphviz,MjAbuz/graphviz,tkelman/graphviz,tkelman/graphviz,ellson/graphviz,tkelman/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,pixelglow/graphviz