CAM LndTuningMode testmods should only shorten ROF_NCPL for short tests

### Brief summary of bug

ROF_NCPL, for at least the clm60cam7LndTuningMode (and likely for the others as well), is higher frequency which is needed for the 9-step cases, but longer cases don't need that done. So tests should only do this for the short 9 step cases and NOT for cases longer than 3 hours.

### General bug information

**CTSM version you are using:** ctsm5.4.022-6-gf2b311cc9

**Does this bug cause significantly incorrect results in the model's science?** No

**Configurations affected:** tests using one of the LndTuningMode testmods

### Details of bug

One implementation would be to have the shell_commands check the value of STOP_OPTION and only change ROF_NCPL if it's set to nsteps. This would probably be fine, since it's only a few tests currently the only nstep tests are either for 9 or 1 step (numbers of tests are 49 and 11 respectively).

### Important details of your setup / configuration so we can reproduce the bug

I saw this in a SMS.ne30pg3_t232.I2000Clm60BgcCrop.derecho_intel.clm-clm60cam7LndTuningMode test.

### Important output or errors that show the problem

``` shell
git grep NCPL | more
FatesColdCamLndTuningMode/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
FatesColdSatPhenCamLndTuningMode/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
clm45cam4LndTuningModeZDustSoilErod/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
clm50cam5LndTuningModeZDustSoilErod/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
clm50cam6LndTuningMode/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
clm50cam7LndTuningMode/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
clm60cam6LndTuningMode/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
clm60cam7LndTuningMode/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
for_testing_fastsetup_bypassrun/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
waccmx_offline/shell_commands:./xmlchange USE_ESMF_LIB=TRUE,ATM_NCPL=288,CALENDAR=GREGORIAN,ROF_NCPL='$ATM_NCPL',LND_TUNING_MODE="clm5_0_cam6.0"
waccmx_offline/shell_commands:./xmlchange ROF_NCPL='$ATM_NCPL'
```

And this applies to all of these tests (from git grep LndTuning testlist_clm.xml | grep -v Ln9):

``` xml
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
testlist_clm.xml:
```

The for_testing_fastsetup_bypassrun and waccmx_offline tests are both short on purpose, so it's OK for it to be short.