use 'sylius.model.*.class' parameters in routing config
Merge pull request #1544 from lsmith77/use_params_for_class_in_routing_config

use 'sylius.model.*.class' parameters in routing config
Fixed issue #1549
Merge pull request #1550 from umpirsky/fix/issue-1549

Fixed issue #1549
Removed unused variables
Added use of handleRequest method

Added use of handleRequest method
Merge pull request #1553 from saro0h/remove-unused-variables

Removed unused variables.
Merge pull request #1555 from saro0h/use-handle-request

Added use of handleRequest method.