CRM-15197 - Fix for WebTest_Contribute_UpdateContributionTest::testChangePremium

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* CRM-15197:
  https://issues.civicrm.org/jira/browse/CRM-15197
Merge pull request #4137 from davecivicrm/CRM-15197e

CRM-15197 - Fix for WebTest_Contribute_UpdateContributionTest::testChang...