Merge pull request #123 from shivupa/addfiletotxt

ORCA MP2 gradient file was missing from regressionfiles.txt

Author: berquist

regressionfiles.txt

@@ -389,6 +389,7 @@ ORCA/ORCA4.1/750.out
 ORCA/ORCA4.1/raw_failed_run_from_issue_426.out
 ORCA/ORCA4.1/orca_from_issue_736.out
 ORCA/ORCA4.1/porphine.out
+ORCA/ORCA4.2/MP2-gradient.out
 Psi3/Psi3.4/dvb_sp_hf.out
 Psi3/Psi3.4/water_psi3.log
 Psi4/Psi4-0.5/sample_fd-freq-gradient.out