Intent of namespace_handler.go ×2

All 4 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 4 tests
- server/ 4 tests
  - service/ 4 tests
    
    frontend/ 4 tests
    
    TestNamespaceHandlerCommonSuite/ 4 tests
    
    go.temporal.io/server/service/frontend/TestNamespaceHandlerCommonSuite/TestRegisterGlobalNamespace_AllDefault Inherited TestRegisterGlobalNamespace_AllDefault
    
    go.temporal.io/server/service/frontend/TestNamespaceHandlerCommonSuite/TestRegisterGlobalNamespace_NoDefault Inherited TestRegisterGlobalNamespace_NoDefault
    
    go.temporal.io/server/service/frontend/TestNamespaceHandlerCommonSuite/TestRegisterNamespace_WithOneCluster Inherited TestRegisterNamespace_WithOneCluster
    
    go.temporal.io/server/service/frontend/TestNamespaceHandlerCommonSuite/TestRegisterNamespace_WithTwoCluster Inherited TestRegisterNamespace_WithTwoCluster