[localnet] Reformat run.sh and use min of 8 threads for tests

localnet/scripts/run.sh

@@ -93,11 +93,10 @@ Integration tester for localnet
 Option:      Help:
 -B           Do NOT build binray before testing
 -k           Keep localnet running after tests are finished
-"
+" ;;
   esac
 done
 
-
 setup
 build_and_start_localnet || exit 1 &
 sleep 20
@@ -105,8 +104,9 @@ wait_for_localnet_boot 100  # Timeout at ~300 seconds
 
 echo -e "\n=== \e[38;5;0;48;5;255mSTARTING TESTS\e[0m ===\n"
 sleep 5
+proc_count=$(nproc)
 error=0
-cd "$DIR/../" && python3 -u -m py.test -v -r s -s tests -n auto || error=1
+cd "$DIR/../" && python3 -u -m py.test -v -r s -s tests -n $((proc_count < 8 ? 8 : proc_count)) || error=1
 
 if [ "$KEEP" == "true" ]; then
   tail -f /dev/null