Fix for coverage failures when only one python file

scripts/common.python

@@ -234,8 +234,9 @@ function python_process_coverage() {
     done
 
     coverage_percentage=$(coverage report --omit "${ignore_options}" \
-                            | egrep -o "^TOTAL.*([0-9\.]+)%" \
-                            | awk 'END { print int($6) }')
+                            | tail -1 \
+                            | sed -n 's/^.*[^0-9]\([0-9][0-9\.]*\)%.*$/\1/ p' \
+                            | awk 'END { print int($1) }')
     echo "Python coverage: ${coverage_percentage}%"
 }