develop product class + controller + page
Employee
Modified menu
Developed Product
Tested Components from bootstrap
Same commit
add some bootstrap components in listproduct.html
customize menu.html
research ok for product
Merge remote-tracking branch 'origin/product' into Dev

Conflicts:
	ProjAppliWeb/src/main/java/m2/project/Application.java
	ProjAppliWeb/src/main/java/m2/project/config/WebSecurityConfig.java
	ProjAppliWeb/src/main/resources/templates/fragments/menu.html
Merge remote-tracking branch 'origin/employees' into Dev

Conflicts:
	ProjAppliWeb/src/main/java/m2/project/config/WebSecurityConfig.java
	ProjAppliWeb/src/main/java/m2/project/controller/CustomerController.java
Customer : form select multiple customer groups + add service layer