Webtest Fixes

Fixed the following Webtests:
1) WebTest_Campaign_MailingTest::testCreateCampaign (failure result due to the page title change for "Scheduled and Unscheduled Mailing" to "Find Mailing" in CRM-13382)
2) WebTest_Event_MultiprofileEventTest::testAnoumyousRegisterPage
3) Failure: WebTest_Mailing_MailingTest::testAddMailing
4) Failure: WebTest_Mailing_MailingTest::testAdvanceSearchAndReportCheck