Remove deprecated test RestAssuredTemplates class, move test case class

This change set simplifies down the test case builder and usage to be setting up the test case, then using the test builder for specific cases. This introduces many breaking changes and should be handled with care

testing/src/main/java/org/eclipsefoundation/testing/helpers/TestCaseHelper.java

@@ -15,7 +15,7 @@ import java.util.Optional;
 
 import javax.ws.rs.core.Response.Status;
 
-import org.eclipsefoundation.testing.templates.RestAssuredTemplates.EndpointTestCase;
+import org.eclipsefoundation.testing.models.EndpointTestCase;
 
 import io.restassured.http.ContentType;
 
@@ -113,27 +113,6 @@ public class TestCaseHelper {
                 .build();
     }
 
-    /**
-     * Creates a EndpointTestCase object with the desired path, params, and request format. Used to test an invalid request
-     * body format. Status code 500 (Internal Error) is assumed.
-     * 
-     * @param path the endpoint URL
-     * @param params the request path/query parameters
-     * @param invalidFormat the invalid request format
-     * @return the desired endpoint test case
-     * @deprecated Will be replaced by {@link this#buildInvalidRequestFormatCase(String, String[], ContentType)}
-     */
-    @Deprecated(forRemoval = true)
-    public static EndpointTestCase buildInvalidFormatCase(String path, String[] params, ContentType invalidFormat) {
-        return EndpointTestCase
-                .builder()
-                .setPath(path)
-                .setParams(Optional.of(params))
-                .setRequestContentType(invalidFormat)
-                .setStatusCode(Status.INTERNAL_SERVER_ERROR.getStatusCode())
-                .build();
-    }
-
     /**
      * Creates a EndpointTestCase object with the desired path, params, and request format. Used to test an invalid response
      * body format. Status code 406 (Not Acceptable) is assumed. While this test case isn't very meaningful when the