CS2BACKBONE: one more regtest

regtest/has-almost/rt2/Makefile

+include ../../scripts/test.make

regtest/has-almost/rt2/colvar.reference

+#! FIELDS time cs csn
+ 0.000000  86.6797  86.6797
+ 0.050000  56.3012  56.3012
+ 0.100000  38.1827  38.1827
+ 0.150000  13.8305  13.8305
+ 0.200000  18.7268  18.7268
+ 0.250000  94.5782  94.5782
+ 0.300000  58.3071  58.3071
+ 0.350000  27.9176  27.9176
+ 0.400000  15.3648  15.3648
+ 0.450000  27.7054  27.7054
+ 0.500000   1.2230   1.2230
+ 0.550000  45.3258  45.3258

regtest/has-almost/rt2/config

+plumed_needs="almost"
+mpiprocs=2
+type=driver
+arg="--plumed plumed.dat --trajectory-stride 10 --timestep 0.005 --ixyz ala12_trajectory.xyz"

regtest/has-almost/rt2/plumed.dat

+cs: CS2BACKBONE ATOMS=7-126 NRES=17 TERMINI=NONE,NONE DATA=../../data/ NEIGH_FREQ=1 
+csn: CS2BACKBONE ATOMS=7-126 NRES=17 TERMINI=NONE,NONE DATA=../../data/ SERIAL NEIGH_FREQ=1
+
+PRINT ARG=cs,csn STRIDE=1 FILE=colvar FMT=%8.4f