Increase threshold for scatter test

backport bf0366a on release 5.1 branch,
but also correct echo statement

Occasional numerical errors cause the difference to be larger than 6%, so increased it to 7%.

Fixes #1164

Author: KrisThielemans

recon_test_pack/run_scatter_tests.sh

@@ -134,9 +134,9 @@ if [ $? -ne 0 ]; then
 fi
 
 
-echo "===  compare result (up to 6%)"
+echo "===  compare result (up to 7%)"
 # threshold needs to be a bit high as scatter_cylinder.hs was generated without random sampling
-compare_projdata -t .06 my_estimated_scatter_3.hs my_upsampled_scatter_cylinder.hs > my_estimate_scatter_compare_projdata.log 2>&1
+compare_projdata -t .07 my_estimated_scatter_3.hs my_upsampled_scatter_cylinder.hs > my_estimate_scatter_compare_projdata.log 2>&1
 if [ $? -ne 0 ]; then
   echo "Error comparing scatter output."
   error_log_files="${error_log_files} my_estimate_scatter*.log"