Fixed indentation in camel/test.properties

[judovana]

The indentation was so wrong, that the file could not be parsed

[judovana]

Found when running #5575 (comment)

[sophia-guo]

The parsing error was caused by the updated strict parsing format from PROP_VALUE=cat $PROPERTY_FILE | grep "$PROP_KEY" | cut -d'=' -f 2-`` to local PROP_VALUE=cat "${FILE}" | grep -v "^#" | grep "^${PROP_KEY}=" | cut -d'=' -f 2-, which requires the no space before the each property line. So probably we need also update some documents.