update unit test module source
"import System;\n" \
"\n" \
"abstract class UnitTest {\n" \
-" var METHOD_NAME_PADDING = ' ';\n" \
-" var RESULTS_PADDING = ' ';\n" \
-" var ASSERTION_PADDING = ' ';\n" \
+" const METHOD_NAME_PADDING = ' ';\n" \
+" const RESULTS_PADDING = ' ';\n" \
+" const ASSERTION_PADDING = ' ';\n" \
" var forceOnlyFailures = false;\n" \
" var forceExitOnFailure = false;\n" \
"\n" \
