Attempt to solve http server unit test fails

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

controller/controller.go

@@ -173,8 +173,11 @@ func initialize() error {
 	}
 
 	coreLock.Lock()
-	startHttpServer()
-	coreLock.Unlock()
+	defer coreLock.Unlock()
+	err = startHttpServer()
+	if err != nil {
+		return err
+	}
 
 	return nil
 }