Added regtest

for DEBUG logActivity and logRequestedAtoms

regtest/basic/rt73/Makefile

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

regtest/basic/rt73/act.reference

+activity at step 0: ++++
+activity at step 2: +-+-
+activity at step 3: -+-+
+activity at step 4: +-+-

regtest/basic/rt73/config

+type=driver
+# this is to test a different name
+arg="--plumed plumed.dat --trajectory-stride 1 --timestep 0.005 --ixyz trajectory.xyz"
+extra_files="../../trajectories/trajectory.xyz"

regtest/basic/rt73/d1.reference

+#! FIELDS time d1
+ 0.000000 1.162646
+ 0.010000 1.097928
+ 0.020000 1.086855

regtest/basic/rt73/d2.reference

+#! FIELDS time d2
+ 0.000000 2.655848
+ 0.015000 2.569344

regtest/basic/rt73/plumed.dat

+d1: DISTANCE ATOMS=1,10
+d2: DISTANCE ATOMS=2,11
+
+PRINT ARG=d1 FILE=d1 STRIDE=2
+PRINT ARG=d2 FILE=d2 STRIDE=3
+
+DEBUG logRequestedAtoms FILE=req
+DEBUG logActivity FILE=act
+
+ENDPLUMED
+

regtest/basic/rt73/req.reference

+requested atoms at step 0:  0 1 9 10
+requested atoms at step 1: 
+requested atoms at step 2:  0 9
+requested atoms at step 3:  1 10
+requested atoms at step 4:  0 9