Fix sql phpunit regression

htdocs/install/mysql/migration/3.9.0-4.0.0.sql

@@ -86,5 +86,3 @@ CREATE TABLE IF NOT EXISTS llx_establishment (
   status            tinyint DEFAULT 1
 ) ENGINE=InnoDB;
 
-ALTER TABLE llx_user ADD COLUMN employee tinyint DEFAULT 0 AFTER ref_int;
-

htdocs/install/mysql/tables/llx_user.sql

@@ -26,7 +26,7 @@ create table llx_user
   ref_ext			varchar(50),				-- reference into an external system (not used by dolibarr)
   ref_int			varchar(50),				-- reference into an internal system (deprecated)
   
-  employee          tinyint        DEFAULT 0,   -- 1 if user is an employee
+  employee          tinyint        DEFAULT 1,   -- 1 if user is an employee
 
   datec             datetime,
   tms               timestamp,

htdocs/user/class/user.class.php

@@ -126,13 +126,17 @@ class User extends CommonObject
 	{
 		$this->db = $db;
 
-		// Preference utilisateur
+		// User preference
 		$this->liste_limit = 0;
 		$this->clicktodial_loaded = 0;
 
+		// For cache usage
 		$this->all_permissions_are_loaded = 0;
-		$this->admin=0;
-
+		
+		// Force some default values 
+		$this->admin = 0;
+		$this->employee = 1;
+		
 		$this->conf				    = new stdClass();
 		$this->rights				= new stdClass();
 		$this->rights->user			= new stdClass();