Adding default environment var value for Azure integration test

Adding default environment var value for Azure integration test and ignore oid test when related env var is unset.

So that when these variables are not set, tests that use these functions will not be affected. For example, with current code, DeleteMemberTest will fail, because method shouldSuccessfullyDeleteUserMember() is trying to use configurationService.getMemberMailId_toBeDeleted(currentTime). And this will return null.