Remove duplication between phys versions in CLM_BLDNML_OPTS settings (and fix some others) in config_component.xml

[billsacks]

When reviewing the changes for ctsm5.1.dev001, I noticed that we have duplication here:

CTSM/cime_config/config_component.xml

Lines 171 to 198 in 2b4802d

	<value compset="_CLM45%[^_]*SP" >-bgc sp</value>
	<value compset="_CLM45%[^_]*CN" >-bgc cn</value>
	<value compset="_CLM45%[^_]*BGC" >-bgc bgc</value>
	<value compset="_CLM45%[^_]*CN-CROP" >-bgc cn -crop</value>
	<value compset="_CLM45%[^_]*BGC-CROP" >-bgc bgc -crop</value>
	<value compset="_CLM45%[^_]*CNDV" >-bgc cn -dynamic_vegetation</value>
	<value compset="_CLM45%[^_]*BGCDV" >-bgc bgc -dynamic_vegetation</value>
	<value compset="_CLM45%[^_]*CNDV-CROP" >-bgc cn -dynamic_vegetation -crop</value>
	<value compset="_CLM45%[^_]*BGCDV-CROP" >-bgc bgc -dynamic_vegetation -crop</value>
	<value compset="_CLM45%[^_]*SP-VIC" >-bgc sp -vichydro </value>
	<value compset="_CLM45%[^_]*FATES" >-bgc fates -no-megan</value>
	<value compset="_CLM50%[^_]*SP" >-bgc sp</value>
	<value compset="_CLM50%[^_]*BGC" >-bgc bgc</value>
	<value compset="_CLM50%[^_]*BGCDV" >-bgc bgc -dynamic_vegetation</value>
	<value compset="_CLM50%[^_]*BGC-CROP" >-bgc bgc -crop</value>
	<value compset="_CLM50%[^_]*CN" >-bgc cn</value>
	<value compset="_CLM50%[^_]*CN-CROP" >-bgc cn -crop</value>
	<value compset="_CLM50%[^_]*CNDV" >-bgc cn -dynamic_vegetation</value>
	<value compset="_CLM50%[^_]*CNDV-CROP" >-bgc cn -dynamic_vegetation -crop</value>
	<value compset="_CLM50%[^_]*BGCDV-CROP" >-bgc bgc -dynamic_vegetation -crop</value>
	<value compset="_CLM50%[^_]*SP-VIC" >-bgc sp -vichydro </value>
	<value compset="_CLM50%[^_]*FATES" >-bgc fates -no-megan</value>
	<value compset="_CLM51%[^_]*SP" >-bgc sp</value>
	<value compset="_CLM51%[^_]*BGC" >-bgc bgc</value>
	<value compset="_CLM51%[^_]*BGC-CROP" >-bgc bgc -crop</value>
	<value compset="_CLM51%[^_]*FATES" >-bgc fates -no-megan</value>

Given that this section already has felt error-prone to me, I feel that we shouldn't make it worse by duplicating settings for different physics versions. So, for example, rather than these three lines:

<value compset="_CLM45%[^_]*SP"		 >-bgc sp</value>
<value compset="_CLM50%[^_]*SP"		 >-bgc sp</value>
<value compset="_CLM51%[^_]*SP"		 >-bgc sp</value>

(and we'll need more in the future)

I feel we should have a single line like this:

<value compset="_CLM[^_]*%SP"		 >-bgc sp</value>

I think the same applies to:

• CLM_NML_USE_CASE: the match for 1850_noanthro_control needs to be changed to work for other phys versions
• CLM_USER_MODS

@ekluzek it looks like you intentionally removed some options (like CNDV) for CLM51. I think this removal can still be accomplished by leaving these out of the description section, as you have done.