Remove private data v1.4 check from CI

[dzikowski]

Our current CI uses Fabric 1.4.11 to verify private data for chaincodes. However, this test fails, because it requires obsolete version of Node (8), obsolete platform-dependent node packages, that needs to be compiled with obsolete tools. Also, last 1.4.x Fabric version has been published over 2 years ago.

There is no need to perform extensive tests for Fabric 1.4.x. And we should:

• [ ] Remove test-03-private-data check - both from CI and the whole test script
• [ ] Move private data checks to test-02-private-data
• [ ] Rename remaining checks, to keep naming consistent (i.e. either rename 04 to 03, or remove numbers entirely from names)
• [ ] Update TEST_CASES.md to reflect the updated test cases

[Sanket-0510]

hey @dzikowski feel free to assign this to me.