Allow to use tomcat or jetty

Default configuration - dev/tomcat
> mvn tomcat7:run-war

 Using prod/tomcat
> mvn clean tomcat7:run-war -Pprod,tomcat

Using dev/jetty
> mvn clean jetty:run-war -Pdev,jetty

Using prod/jetty
> mvn clean jetty:run-war -Pprod,jetty