Ohara: Source connector cannot test config in UI

[saivirtue]

Describe the bug
When adding a new source connector, filling all the requirement fields still cannot pass the validation.

To Reproduce
Steps to reproduce the behavior:

1. create a source connector in pipeline
2. filling all the requirement fields
3. click TEST YOUR CONFIGS
4. See error

Connector name
1: Missing required configuration "name" which has no default value. 
2: name is required! 

Expected behavior
Testing success.

Screenshots
If applicable, add screenshots to help explain your problem.

[saivirtue]

/cc @wu87988622 @konekoya
feel free to take over this issue :)