CLDCONNECT-1643: Fixed functional test cases for 3.5.0 Release

1. Updated connector to 3.5.0-SNAPSHOT 
2. Fixed all the SmokeTests. 4/4 smoke tests passed.
3. Fixed all Regression test. 27/29 tests are passed. The 2 failures should be in org.mule.twitter.automation.testcases.GetUserTimelineTestCases. This is fixed as part of  CLDCONNECT-1657.
4. Updated connector to remove all occurrences of "@Optional"  if "@Default" is already there

This is for https://www.mulesoft.org/jira/browse/CLDCONNECT-1643.