Make username/password optional and add driver property #208
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As we may not have both
username
andpassword
set (for example when using Oracle Wallet, only the URL is set), I made them optional (otherwise it throws an exception if they are empty).I also added the
driver
property that was missing. Not having it defined, for example for Oracle, will lead to runtime exceptions not finding the corresponding driver.I updated the documentation accordingly and took the opportunity to update the default value of
key
andvalue
fields as they had a different default value from what was documented.