WebTest Core Bug

Fix for CRM bug which resulted in Webtests failures -
 - After adding two Tagset used for Contact, a New Contact cannot be created by New Individual Page
Similarly for Case, Activity etc.
 - $tagsetName consist of contacttaglistparentID_$id for contact from which 'id' is not retrieved correctly, hence the use of explode function.
Affected Webtest Failures - 
WebTest_Contact_TagSetSearchTest::testTagSetSearch
WebTest_Export_ContactTest :: All functions
WebTest_Generic_CheckDashboardTest
WebTest_Import_ContactCustomDataTest