Security Breach!

[stravid87]

Description
After reviewing the Layer8 interceptor / middleware, I notice that we are sending the shared secret across the network???? Bad idea!

	initECDH := func() interface{} {
		secret, pub, mpjwt, err := internals.InitializeECDH(goHeaders)
		if err != nil {
			println(err.Error())
			res.Set("statusCode", 500)
			res.Set("statusMessage", "Failure to initialize ECDH")
			res.Call("end", "500 Internal Server Error")
			return nil
		}

		res.Set("statusCode", 200)
		res.Set("statusMessage", "ECDH Successfully Completed!")
		res.Call("setHeader", "x-shared-secret", secret)
		res.Call("setHeader", "mp-JWT", mpjwt)
		res.Call("end", pub)
		return nil
	}

In the interceptor we don't seem to use the x-shared-secret header... so why are we including it? Likely for debugging purposes. Please try to remove this line, res.Call("setHeader", "x-shared-secret", secret), and then test:.

Acceptance Criteria
The interceptor, proxy, middleware still work with this line commented out.