Fixed fn/tests and locators for new system tab

What is done?
- Fixed various systems tests..
- Blocked some tests with bz
- Removed two tests completely:
    1) Verify system appears on Systems By Environment page in its proper environment --> Since 'By Environment page' is not available in new UI. so removed it
    2) "Remove systems and validate sys-count"   -->Duplicate

What is pending?
- Need to re-visit/test all tests
- validation part of package test is commented out, need to check once
- once logged bz's fixed, need to update tests accordingly ( activation-key and subscription test)