JBERET-452: Remove db-creds from exception message

[DaScheid]

Removing database-properties from exception message, as those might contain database-credentials.
See related issue #452

[liweinan]

@DaScheid instead of deleting the message item, wdyt if change the the usage of the message to:

throw BatchMessages.MESSAGES.failToObtainConnection(e, dbUrl, "<db props> masked");

[DaScheid]

Yes, using a static string of "<db props> masked" would also be an option.
Or did you mean to dynamically exclude only password-/username-properties from the error message, but leave other properties in?

[liweinan]

@DaScheid It's safer to use a static string IMHO. If you agree could you please update your PR according to our discussion? (and please squash the commits)

[liweinan]

@DaScheid Thanks for the contribution!

[DaScheid]

Thank you for the fast review @liweinan