Redirect to Public Catalog for multi-button scenarios

[jsavell]

When using the redirect endpoint and there are multiple GIFM options, redirect to the public catalog so the user can select the appropriate option.

This has been thoroughly tested in pre-production by the Discovery and GIFM teams over the last three months.

[kaladay]

Looks like github No longer allows it to be approved with comments?

Oh...the PR got merged while I was reviewing.

[kaladay]

This is just a suggestion.

These if conditon blocks could probably be combined, kind of like this:

                        // When the user wants Cushing, grab the url of the first button that is for Cushing.
                        // When the user doesn't want Cushing, grab the first button that isn't Cushing.
                        if (redirectUrl == null && linkHref != null && (!isCushing && !wantsCushing || isCushing && wantsCushing)) {
                            redirectUrl = buildRedirectUrl(linkHref);
                            break;
                        }

[kaladay]

This is just a suggestion.

The initialization is meaningless here.
Why not just default it to false and then the catch can be empty?

            boolean bibIdIsUUID = false;
            try {
                bibIdIsUUID = (UUID.fromString(bibId).toString().equals(bibId));
            } catch (IllegalArgumentException e) {
            }