CREATING 2.4 TAG FOR ecommerce_discount_coupon

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_discount_coupon/tags/2.4@3773 950b781c-c544-efab-2f99-90083ee69683
MOVING TAG to BRANCH

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_discount_coupon/branches/2.4@4359 950b781c-c544-efab-2f99-90083ee69683
Updating composer.json files to correct reference to e-commerce

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_discount_coupon/branches/2.4@4656 950b781c-c544-efab-2f99-90083ee69683