tls_first_implementation

[DanielePalaia]

This first implementation of TLS support includes:

• Integrate the tokio-native-tls library
• Implements an Environment Helper Class "TlsConfiguration" to manage Tls options in Environment
• Implements Tls trusting all hostnames and certificates at the moment (just encryption offered)
• Adding a test on port 5551

[wolf4ood]

I would use ? here instead of unwrap()

Suggested change

	let conn = tls_builder.build();
	let conn = tokio_native_tls::TlsConnector::from(conn.unwrap());
	let stream = conn.connect(broker.host.as_str(), stream).await;
	GenericTcpStream::SecureTcp(stream.unwrap())
	let conn = tokio_native_tls::TlsConnector::from(tls_builder.build()?);
	let stream = conn.connect(broker.host.as_str(), stream).await?;
	GenericTcpStream::SecureTcp(stream)

[wolf4ood]

For the TlsConfiguration probably it's better if we do a builder pattern?

Something like this

pub struct TlsConfigurationBuilder(TlsConfiguration);

impl TlsConfigurationBuilder {

   pub fn trust_everything(mut self, trust_everything: bool)  -> TlsConfigurationBuilder {
        self.0.trust_everything = trust_everything;
        self
    }

    pub fn enable(mut self, enable: bool)  -> TlsConfigurationBuilder {
        self.0.enabled = enabled;
        self
    }


    pub fn hostname_verification_enable(mut self, hostname_verification: bool) -> TlsConfigurationBuilder  {
        self.0.hostname_verification = hostname_verification;
        self
    }

    pub fn build(self) -> TlsConfiguration {
       self.0
    }
}


impl TlsConfiguration {

   pub fn builder() -> TlsConfigurationBulder {
    TlsConfigurationBulder(TlsConfiguration::default())
   }
  
}

[DanielePalaia]

Hey @wolf4ood thanks for your review! Addressed the issues!