Adding Proxy Support (Code attached)

[ValorHeart]

Hello, Please review the below code and consider adding it to the difido-testng project.
File: RemoteDifidoReporter (Line 97)
if (difidoConfig.getPropertyAsBoolean(RemoteDifidoOptions.USE_PROXY)) {
String proxyHost = difidoConfig.getPropertyAsString(RemoteDifidoOptions.PROXY_HOST);
int proxyPort = difidoConfig.getPropertyAsInt(RemoteDifidoOptions.PROXY_PORT);
String proxyUserName = difidoConfig.getPropertyAsString(RemoteDifidoOptions.PROXY_USERNAME);
String proxyPassword = difidoConfig.getPropertyAsString(RemoteDifidoOptions.PROXY_PASSWORD);
client = new DifidoClient(host, port, proxyHost, proxyPort, proxyUserName, proxyPassword);
}
else {
client = new DifidoClient(host, port);
}

File: DifidoClient (Line 32)
public DifidoClient(String host, int port, String proxyHost, int proxyPort, String proxyUserName, String proxyPassword) {
baseUri = String.format(BASE_URI_TEMPLATE, host, port);
client = new HttpClient();
Credentials credentials = new UsernamePasswordCredentials(proxyUserName, proxyPassword);
AuthScope authScope = new AuthScope(proxyHost, proxyPort);
client.getState().setProxyCredentials(authScope, credentials);
}

File: RemoteDifidoConfig (Line 26)
USE_PROXY("use.proxy", "false"),
PROXY_HOST("proxy.host", ""),
PROXY_PORT("proxy.port", ""),
PROXY_USERNAME("proxy.username", ""),
PROXY_PASSWORD("proxy.password", "");