Add del2, del4 manufactured solution variants to pr suite

Author: cbegeman

polaris/suites/ocean/omega_pr.txt

@@ -1,4 +1,6 @@
 ocean/planar/manufactured_solution/convergence_both/default
+ocean/planar/manufactured_solution/convergence_both/del2
+ocean/planar/manufactured_solution/convergence_both/del4
 ocean/spherical/icos/rotation_2d
 ocean/spherical/icos/cosine_bell/decomp
 ocean/spherical/icos/cosine_bell/restart