Simple example for multi-user management added

Signed-off-by: Dominic Schabel <dominic.schabel@bosch-si.com>

hawkbit-runtime/hawkbit-update-server/src/main/resources/application.properties

@@ -26,3 +26,10 @@ spring.rabbitmq.password=guest
 spring.rabbitmq.virtual-host=/
 spring.rabbitmq.host=localhost
 spring.rabbitmq.port=5672
+
+# Define own users instead of default "admin" user:  
+#hawkbit.server.im.users[0].username=hawkbit
+#hawkbit.server.im.users[0].password={noop}isAwesome!
+#hawkbit.server.im.users[0].firstname=Eclipse
+#hawkbit.server.im.users[0].lastname=HawkBit
+#hawkbit.server.im.users[0].permissions=ALL