BUG FIX, remove PX updates that packaged RA and RS (wrf-model#763)

TYPE: bug fix

KEYWORDS: bug, PX, RA, RS, package, Noah

SOURCE: internal

DESCRIPTION OF CHANGES:
Problem:
After commit sha eb79235 (PR wrf-model#733 US EPA PX LSM updates), most uses
of sf_surface_physics=2 would fail in the first time step with
messages that indicated some memory corruption:
```
wrf.exe(68190,0x7fff9be48380) malloc: *** error for object 0x7f8fdbc0db78: incorrect checksum for freed object - object was probably modified after being freed.
```
or a horrific number of CFLs that tend to not usually happen at the beginning of
the WRF model simulation when given a reasonable IC:
```
       70631  points exceeded cfl=2 in domain d01 at time 2000-01-24_12:00:00 hours
 MAX AT i,j,k:           40          13          48  vert_cfl,w,d(eta)=   3.81348181E+18  -8.02897697E+15   4.13541310E-03
```
Solution:
A possible solution was to go ahead and include physics packages that
permitted super-light speeds, but that seemed time consuming and Star Fleet 
derivative.

Alternatively, it was noticed that the developers included RA and RS as
part of the package for the sf_surface_physics==7 (PXLSMSCHEME). These
variables are not unique to the PX LSM scheme, and were part of the
argument list for Noah LSM. Removing RA and RS from the PXLSMPSCHEME
list of packaged variables is a correction that fits the symptomology of the 
reported errors.

LIST OF MODIFIED FILES:
M     Registry/Registry.EM_COMMON

TESTS CONDUCTED:
1. Serial, OpenMP, and MPI with sf_surface_physics=2 all fail in the first time step, without this mod.
2. All three build options with gnu/6.3.0 work when including this mod.

Registry/Registry.EM_COMMON

@@ -2779,7 +2779,7 @@ package   lsmscheme      sf_surface_physics==2       -             state:flx4,fv
 package   ruclsmscheme   sf_surface_physics==3       -             state:smfr3d,keepfr3dflag,soilt1,rhosnf,snowfallac,precipfr,acrunoff
 package   noahmpscheme   sf_surface_physics==4       -             state:isnowxy,tvxy,tgxy,canliqxy,canicexy,eahxy,tahxy,cmxy,chxy,fwetxy,sneqvoxy,alboldxy,qsnowxy,wslakexy,zwtxy,waxy,wtxy,tsnoxy,zsnsoxy,snicexy,snliqxy,lfmassxy,rtmassxy,stmassxy,woodxy,stblcpxy,fastcpxy,xsaixy,taussxy,t2mvxy,t2mbxy,q2mvxy,q2mbxy,tradxy,neexy,gppxy,nppxy,fvegxy,qinxy,runsfxy,runsbxy,ecanxy,edirxy,etranxy,fsaxy,firaxy,aparxy,psnxy,savxy,sagxy,rssunxy,rsshaxy,bgapxy,wgapxy,tgvxy,tgbxy,chvxy,chbxy,shgxy,shcxy,shbxy,evgxy,evbxy,ghvxy,ghbxy,irgxy,ircxy,irbxy,trxy,evcxy,chleafxy,chucxy,chv2xy,chb2xy,chstarxy,smoiseq,smcwtdxy,rechxy,deeprechxy,fdepthxy,areaxy,rivercondxy,riverbedxy,eqzwt,pexpxy,qrfxy,qrfsxy,qspringxy,qspringsxy,qslatxy,stepwtd,rechclim,gddxy,grainxy,croptype,planting,harvest,season_gdd,cropcat,pgsxy,soilcomp,soilcl1,soilcl2,soilcl3,soilcl4
 package   clmscheme      sf_surface_physics==5       -             state:numc,nump,sabv,sabg,lwup,lhsoi,lhveg,lhtran,snl,snowdp,wtc,wtp,h2osno,t_grnd,t_veg,h2ocan,h2ocan_col,t2m_max,t2m_min,t2clm,t_ref2m,h2osoi_liq_s1,h2osoi_liq_s2,h2osoi_liq_s3,h2osoi_liq_s4,h2osoi_liq_s5,h2osoi_liq1,h2osoi_liq2,h2osoi_liq3,h2osoi_liq4,h2osoi_liq5,h2osoi_liq6,h2osoi_liq7,h2osoi_liq8,h2osoi_liq9,h2osoi_liq10,h2osoi_ice_s1,h2osoi_ice_s2,h2osoi_ice_s3,h2osoi_ice_s4,h2osoi_ice_s5,h2osoi_ice1,h2osoi_ice2,h2osoi_ice3,h2osoi_ice4,h2osoi_ice5,h2osoi_ice6,h2osoi_ice7,h2osoi_ice8,h2osoi_ice9,h2osoi_ice10,t_soisno_s1,t_soisno_s2,t_soisno_s3,t_soisno_s4,t_soisno_s5,t_soisno1,t_soisno2,t_soisno3,t_soisno4,t_soisno5,t_soisno6,t_soisno7,t_soisno8,t_soisno9,t_soisno10,dzsnow1,dzsnow2,dzsnow3,dzsnow4,dzsnow5,snowrds1,snowrds2,snowrds3,snowrds4,snowrds5,t_lake1,t_lake2,t_lake3,t_lake4,t_lake5,t_lake6,t_lake7,t_lake8,t_lake9,t_lake10,h2osoi_vol1,h2osoi_vol2,h2osoi_vol3,h2osoi_vol4,h2osoi_vol5,h2osoi_vol6,h2osoi_vol7,h2osoi_vol8,h2osoi_vol9,h2osoi_vol10,albedosubgrid,lhsubgrid,hfxsubgrid,lwupsubgrid,q2subgrid,sabvsubgrid,sabgsubgrid,nrasubgrid,swupsubgrid
-package   pxlsmscheme    sf_surface_physics==7       -             state:t2_ndg_new,q2_ndg_new,t2_ndg_old,q2_ndg_old,t2obs,q2obs,ra,rs,vegf_px,imperv,canfra,lai_px,wwlt_px,wfc_px,wsat_px,clay_px,csand_px,fmsand_px
+package   pxlsmscheme    sf_surface_physics==7       -             state:t2_ndg_new,q2_ndg_new,t2_ndg_old,q2_ndg_old,t2obs,q2obs,vegf_px,imperv,canfra,lai_px,wwlt_px,wfc_px,wsat_px,clay_px,csand_px,fmsand_px
 package   ssibscheme     sf_surface_physics==8       -             state:ssib_fm,ssib_fh,ssib_cm,ssibxdd,ssib_br,ssib_lhf,ssib_shf,ssib_ghf,ssib_egs,ssib_eci,ssib_ect,ssib_egi,ssib_egt,ssib_sdn,ssib_sup,ssib_ldn,ssib_lup,ssib_wat,ssib_shc,ssib_shg,ssib_lai,ssib_vcf,ssib_z00,ssib_veg,isnow,swe,snowden,snowdepth,tkair,dzo1,wo1,tssn1,tssno1,bwo1,bto1,cto1,fio1,flo1,bio1,blo1,ho1,dzo2,wo2,tssn2,tssno2,bwo2,bto2,cto2,fio2,flo2,bio2,blo2,ho2,dzo3,wo3,tssn3,tssno3,bwo3,bto3,cto3,fio3,flo3,bio3,blo3,ho3,dzo4,wo4,tssn4,tssno4,bwo4,bto4,cto4,fio4,flo4,bio4,blo4,ho4
 
 package   noahmpoptcrop2 opt_crop==2                 -             state:gecros_state