While I wish to use Subclipse...
but I have difficulty to get maven submodules not just to be independent "main" project, instead what i wish to achieve is to be "submodule" of a parent project for multi submodules operations...
So I have to revert back to Subversive.
Uninstall Subclipse
1 of - About Eclipse
2 of - installation detail
3 of - select targeted installation to revert
Search in Eclipse Marketplace
Choose to install.
extra selections(either M2E or Mylyn) wouldn't be install as missing prerequisites.
Accept agreement.
bug: cancel preference before install connector.
Select All > Trust Selected.