fix() wrong parameter used to login (#369)

* BONITA_TECHNICAL_USER isn't use anymore as password to login,
BONITA_TECHNICAL_USER_PASSWORD is now used.

bundles/plugins/org.bonitasoft.studio.engine/src/org/bonitasoft/studio/engine/BOSWebServerManager.java

@@ -287,7 +287,7 @@ public class BOSWebServerManager {
         while (session == null && loginTry < MAX_LOGGING_TRY) {
             try {
                 session = BOSEngineManager.getInstance().getLoginAPI().login(BOSEngineManager.BONITA_TECHNICAL_USER,
-                        BOSEngineManager.BONITA_TECHNICAL_USER);
+                        BOSEngineManager.BONITA_TECHNICAL_USER_PASSWORD);
             } catch (final Exception e) {
                 loginTry++;
                 try {