Fix machine config for edison.

Add PROJECT info.
Change CESMSCRATCHROOT to not conflict with other nersc machines.

[BFB]

cime/cime_config/acme/machines/config_machines.xml

@@ -60,6 +60,7 @@
   <TESTS>acme_developer</TESTS>
   <COMPILERS>intel,gnu,cray</COMPILERS>
   <MPILIBS>mpt,mpi-serial</MPILIBS>
+  <CESMSCRATCHROOT>$ENV{SCRATCH}/acme_scratch/edison</CESMSCRATCHROOT>
   <RUNDIR>$CESMSCRATCHROOT/$CASE/run</RUNDIR>
   <EXEROOT>$CESMSCRATCHROOT/$CASE/bld</EXEROOT>
   <DOUT_S_ROOT>$CESMSCRATCHROOT/archive/$CASE</DOUT_S_ROOT>
@@ -70,7 +71,8 @@
   <GMAKE_J>8</GMAKE_J>
   <MAX_TASKS_PER_NODE>48</MAX_TASKS_PER_NODE>
   <PES_PER_NODE>24</PES_PER_NODE>
-  <CESMSCRATCHROOT>$ENV{SCRATCH}/acme_scratch</CESMSCRATCHROOT>
+  <PROJECT>acme</PROJECT>
+  <PROJECT_REQUIRED>TRUE</PROJECT_REQUIRED>
   <DIN_LOC_ROOT>/project/projectdirs/acme/inputdata</DIN_LOC_ROOT>
   <DIN_LOC_ROOT_CLMFORC>/project/projectdirs/acme/inputdata/atm/datm7</DIN_LOC_ROOT_CLMFORC>
   <CCSM_BASELINE>/project/projectdirs/acme/baselines</CCSM_BASELINE>