Fix requirejs-maven-plugin and org.mortbay.jetty configuration in generated pom

[jvillanti]

Examples :

<!-- webAppSourceDirectory>${basedir}/target/${project.build.finalName}</webAppSourceDirectory -->

instead of 

<!-- <webAppSourceDirectory>${basedir}/target/${project.build.finalName}</webAppSourceDirectory> -->

and

<configuration>
  <!-- path to optimizer json config file -->
  <configFile>/root/resthub/resthub-archetypes/target/checkout/resthub-jpa-backbonejs-multi-archetype/src/main/webapp/js/build/build-maven-config.js</configFile>
  <!-- optional path to optimizer executable -->
  <optimizerFile>/root/resthub/resthub-archetypes/target/checkout/resthub-jpa-backbonejs-multi-archetype/src/main/webapp/js/build/r.js</optimizerFile>
  <!-- whether or not to process config with maven filters -->
  <filterConfig>true</filterConfig>
  <!-- Skip requirejs optimization if true -->
  <skip>false</skip>
</configuration>

instead of

<configuration>
  <!-- path to optimizer json config file -->
  <configFile>${basedir}/src/main/webapp/js/build/build-maven-config.js</configFile>
  <!-- optional path to optimizer executable -->
  <optimizerFile>${basedir}/src/main/webapp/js/build/r.js</optimizerFile>
  <!-- whether or not to process config with maven filters -->
  <filterConfig>true</filterConfig>
  <!-- Skip requirejs optimization if true -->
  <skip>false</skip>
</configuration>