RANGER-4660: fixed error while creating service having name without an underscore
diff --git a/security-admin/src/main/java/org/apache/ranger/rest/ServiceREST.java b/security-admin/src/main/java/org/apache/ranger/rest/ServiceREST.java
index f9fd494..1147d9b 100644
--- a/security-admin/src/main/java/org/apache/ranger/rest/ServiceREST.java
+++ b/security-admin/src/main/java/org/apache/ranger/rest/ServiceREST.java
@@ -4405,7 +4405,7 @@
 			if (StringUtils.isBlank(ret)) {
 				final int lastIndexOfSep = StringUtils.lastIndexOf(resourceServiceName, SEP);
 
-				ret = (lastIndexOfSep != -1) ? resourceServiceName.substring(0, lastIndexOfSep) + SEP + linkedServiceType : null;
+				ret = (lastIndexOfSep != -1) ? resourceServiceName.substring(0, lastIndexOfSep) + SEP + linkedServiceType : linkedServiceType;
 			}
 
 			return ret;