Add gold master tests for new backplanes

[jnspitale]

RING_LONGITUDE_WRT_NODE
EDGE_ON_RING_LONGITUDE_WRT_NODE
SUB_SOLAR_RING_LONGITUDE_WRT_NODE
SUB_OBSERVER_RING_LONGITUDE_WRT_NODE
SURFACE_INTERCEPT_TIME
EDGE_ON_RING_ALTITUDE
CENTER_X/Y_COORDINATE
LONGITUDINAL_RESOLUTION
DIAMETER_IN_PIXELS
NORTH_POLE_POSITION_ANGLE
NORTH_POLE_CLOCK_ANGLE
LIMB_CLOCK_ANGLE
LIMB_ALTITUDE