remove dependency on internal SAML packages

 pom.xml

@@ -85,7 +85,7 @@
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-saml-core</artifactId>
            <version>${keycloak.version}</version>
            <scope>provided</scope>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
@@ -126,7 +126,7 @@
                <configuration>
                    <archive>
                        <manifestEntries>
                            <Dependencies>javax.xml.bind.api,org.keycloak.keycloak-core,org.keycloak.keycloak-server-spi,org.keycloak.keycloak-server-spi-private,org.keycloak.keycloak-services,org.keycloak.keycloak-saml-core,org.keycloak.keycloak-saml-core-public</Dependencies>
                            <Dependencies>javax.xml.bind.api,org.keycloak.keycloak-core,org.keycloak.keycloak-server-spi,org.keycloak.keycloak-server-spi-private,org.keycloak.keycloak-services</Dependencies>
                        </manifestEntries>
                    </archive>
                </configuration>

 src/main/java/org/keycloak/protocol/cas/utils/LogoutHelper.java

@@ -8,15 +8,14 @@
import org.apache.http.entity.StringEntity;
import org.keycloak.connections.httpclient.HttpClientProvider;
import org.keycloak.models.KeycloakSession;
import org.keycloak.saml.common.exceptions.ConfigurationException;
import org.keycloak.saml.processing.core.saml.v2.common.IDGenerator;
import org.keycloak.saml.processing.core.saml.v2.util.XMLTimeUtil;

import javax.ws.rs.core.HttpHeaders;
import javax.xml.datatype.XMLGregorianCalendar;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

public class LogoutHelper {
    //although it looks alike, the CAS SLO protocol has nothing to do with SAML; so we build the format
@@ -27,14 +26,9 @@
            "</samlp:LogoutRequest>";

    public static HttpEntity buildSingleLogoutRequest(String serviceTicket) {
        String id = IDGenerator.create("ID_");
        XMLGregorianCalendar issueInstant;
        try {
            issueInstant = XMLTimeUtil.getIssueInstant();
        } catch (ConfigurationException e) {
            throw new RuntimeException(e);
        }
        String document = TEMPLATE.replace("$ID", id).replace("$ISSUE_INSTANT", issueInstant.toString())
        String id = "ID_" + UUID.randomUUID().toString();
        String issueInstant = new SimpleDateFormat("yyyy-MM-dd'T'H:mm:ss").format(new Date());
        String document = TEMPLATE.replace("$ID", id).replace("$ISSUE_INSTANT", issueInstant)
                .replace("$SESSION_IDENTIFIER", serviceTicket);
        return new StringEntity(document, ContentType.APPLICATION_XML.withCharset(StandardCharsets.UTF_8));
    }