Added a comparison test for retrieved grib files of different versions (Regression test)

test/Regression/Compare_gribfiles/7.0.4/Controls/CONTROL_EA5.compare

+DAY1
+DAY2
+DTIME 3
+TYPE AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN
+TIME 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
+STEP 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ACCTYPE FC
+ACCTIME 06/18
+ACCMAXSTEP 12
+CLASS EA
+STREAM OPER
+NUMBER OFF
+EXPVER 1
+GRID 1000  
+LEFT -0
+LOWER 0
+UPPER 5000
+RIGHT 5000
+LEVEL 137
+LEVELIST 130/to/137
+CWC 1
+RESOL 159
+GAUSS 0
+ACCURACY 24
+OMEGA 0
+OMEGADIFF 0
+ETA 1
+ETADIFF 0
+DPDETA 1
+SMOOTH 0
+FORMAT GRIB1
+ADDPAR 186/187/188/235/139/39
+PREFIX EA
+ECSTORAGE 0
+ECTRANS 1
+ECFSDIR ectmp:/${USER}/econdemand/
+MAILFAIL ${USER} 
+MAILOPS ${USER}
+GRIB2FLEXPART 0
+EOF

test/Regression/Compare_gribfiles/7.1/Controls/CONTROL_EA5.compare

+START_DATE
+DTIME 3
+TYPE AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN
+TIME 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
+STEP 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ACCTYPE FC
+ACCTIME 06/18
+ACCMAXSTEP 12
+CLASS EA
+STREAM OPER
+GRID 1.  
+LEFT 0.
+LOWER 0.
+UPPER 5.
+RIGHT 5.
+LEVEL 137
+LEVELIST 130/to/137
+RESOL 159
+ETA 1
+ADDPAR LCC/MCC/HCC/SKT/STL1/SWVL1
+PREFIX EA
+ECTRANS 1
+CWC 1