In RA environment parameter is there a way to:
1) specify a default value ? (so that the web GUI is filled with a value)
2) accept the fact that some values are empty (null) ? (by default RA is generating an error if a value is not filled
1) No, you have to specify the values in the environment configuration screen
2) No, there is no ability to provide an empty string as an input. BTW, I do believe we should allow an empty string.