Updates CON_ContactMerge_TEST2 class
Updates CON_ContactMerge_TEST2 class

Merged the code for DRS contact merge and existing contact merge functionality to CON_ContactMerge_CTRL class so added the test methods to cover the additional code changes in this class
SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus