fix (jans-config-api) : some url fields have object value for oidc clients GET response

[duttarnab]

Describe the bug
For /jans-config-api/api/v1/openid/clients GET following url fields have object value.

• clientUri
• logoUri
• policyUri
• tosUri

Expected behavior
The string values are expected for url fields.

[yuriyz]

These fields are not strings anymore because it was moved to LocalizedString by Javier. It can't be represented with just string.

@duttarnab check this ticket for details #1057

jans/jans-orm/model/src/main/java/io/jans/orm/model/base/LocalizedString.java

Line 21 in a8d0157

public class LocalizedString implements Serializable {

[pujavs]

LocalizedString changes under discussion with @yuriyz @yurem and @qbert2k

[yuriyz]

I guess at the end we agree that simplification is needed as proposed by @yurem

[pujavs]

@qbert2k, request you to please confirm once the LocalizedString changes as suggested by @yurem are implemented so that we can verify and test the impacted functionality.

[pujavs]

@duttarnab, @qbert2k seems to have fixed this. I tested locally and getting these values as string now. request you to please verify.

[pujavs]

Fixed see #2946