Update test req.yaml

Update test req.yaml to refer to new format of pcd.yaml

Author: rljacob

tools/cpcd/test/req.yaml

@@ -1,13 +1,7 @@
-# This is an example of a user-requested list of physical constants
-# to be looked up in the dictionary by the CPCD parser and included
-# in the generate source code.
-
-  ASHandbook1964: [ pi, gamma ]
-  CODATA2014: 
+mathematical: [pi, em_gamma, square_root_of_2]
+universal_physical:
     - standard_acceleration_of_gravity
     - speed_of_light_in_vacuum
     - stefan_boltzmann_constant
-  GRS80: mean_radius
-  IAPWS1995: [ liquid_water_triple_point_density, vapor_water_triple_point_density ]
-  ASHandbook1964: square_root_of_2
-  ASHandbook1964: pi
+earth_physical: mean_radius
+water: [ liquid_water_triple_point_density, vapor_water_triple_point_density ]