Trailing slash healthcheck integration test

(cherry picked from commit 4c41fb18da7ec4de42600afaf56400d5098a2ab1)

testing/register-test-core/src/main/java/org/opengroup/osdu/register/util/RetrieveApiTestTemplate.java

@@ -19,6 +19,8 @@ package org.opengroup.osdu.register.util;
 import com.sun.jersey.api.client.ClientResponse;
 import org.junit.Ignore;
 import org.junit.Test;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -110,4 +112,11 @@ public abstract class RetrieveApiTestTemplate extends BaseTestTemplate {
         assertEquals(error("Expected all successful responses. Actual " + sucessResponseCount), 10, sucessResponseCount);
         assertEquals(error("Unexpected error response returned"), 0, errorResponseCount);
     }
+
+    @Test
+    public void should_returnTrailingOk() throws Exception {
+        ClientResponse response =
+                TestUtils.send("api/register/v1/_ah/liveness_check/", HttpMethod.GET.name(), this.testUtils.getOpsAccessToken(), "", "");
+        assertEquals(HttpStatus.OK, response.getStatus());
+    }
 }