fix checkstyle issue in AccountManagerImplTest

Author: Surya Srinivasan

server/src/test/java/com/cloud/user/AccountManagerImplTest.java

@@ -155,7 +155,7 @@ public static void initClass() {
 
     @Before
     public void setUp() throws Exception {
-    
+
         accountManagerImpl.enableUserTwoFactorAuthentication = enableUserTwoFactorAuthenticationMock;
         accountManagerImpl.allowOperationsOnUsersInSameAccount = allowOperationsOnUsersInSameAccountMock;