Allow path to SSL certificate keystore to be specified in plugin configuration

Although it is possible to enable SSL by specifying a value for the config parameter httpsPort, Tomcat looks by default for

/.keystore for the certificate keystore. It is not possible to override this with a system property (a shortcoming of tomcat - it will, for example, default to javax.net.ssl.trustStore for the truststoreFile). A possible workaround is to use our own server.xml, but this makes the whole thing a lot less usable.

I would propose adding a parameter keystore and then in AbstractRunMojo add a line

Connector httpsConnector = container.createConnector( (InetAddress) null, httpsPort, true );
httpsConnector.setAttribute("keystore", keystore); // <- added line
container.addConnector( httpsConnector );