Merge branch 'feature/flush_print_test' into 'master'

Force flush of stdout in new-testing for each line

In order to allow to watch live testing results, with tools like `less +F`.

If flush isn't forced, results are written in slurm output file only by blocks of many lines, not really practical to watch the progression of the tests.

See merge request !189

new-testing/run_list.c

@@ -927,5 +927,6 @@ run_print_line( const testing_t *test, const run_arg_list_t *arglist,
     }
 
     fprintf( stdout, "%s\n", str );
+    fflush(stdout);
     return;
 }