test: make test-cm accepted with newer GLib
With GLib 2.77.3, the key value "foo;bar" is no longer accepted with g_key_file_get_string and it returns null string result.
Modify key value in test file to get it accepted by new GLib.
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With GLib 2.77.3, the key value "foo;bar" is no longer accepted with g_key_file_get_string and it returns null string result.
Modify key value in test file to get it accepted by new GLib.