fix routing name in Coupon module. Fix #171
Merge pull request #181 from lunika/171-route-coupon-creation

This PR was merged into thelia:master branch.

Discussion
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Fix routing name in Coupon creation module

                        
| Q             | A    |
| ---           | ---  |
| Bug fix?      | y    |
| New feature?  | n    |
| BC breaks?    | n    |
| Deprecations? | n    |
| Tests pass?   | y    |
| Fixed tickets | #171 |
| License       | GPL  |
| Doc PR        |      |
                        


Commits
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992b5be95cdb70100a6d7c77c687a30a22888bd1 fix routing name in Coupon module. Fix #171 lunika