Add 2 year test case

2yrs.cfg

+[acme]
+# This is the name of the case. This should be the name of the directory
+# relative to "shared-scratch" from the site catalog. For example, if
+# your shared-scratch is /scratch/juve, and casename is mycase, then the
+# case should be set up in /scratch/juve/mycase
+casename = F1850.g37.2yrs
+
+# This is the number of cores to use for each stage
+mppwidth = 24
+
+# This is the unit of simulation time
+stop_option = nyears
+
+# This is the number of simulation time units to run for each stage
+stop_n = 2
+
+# This is the walltime for each stage in minutes
+walltime = 360
+