- makes run-codeserver MOJO aware of Maven project of the preceding process-classes execution

This is a proposed fix for https://jira.codehaus.org/browse/MGWT-345 by making the affected run-codeserver MOJO aware of the forked process-classes build which in turn adds the compile source roots. See http://books.sonatype.com/mvnref-book/reference/writing-plugins-sect-custom-plugin.html regarding the "@execute" annotation. ITs were not run since I use Maven 3.1.0 which breaks reporting API (see https://cwiki.apache.org/confluence/display/MAVEN/AetherClassNotFound) but the run-codeserver MOJO correctly picks up the generated "async" interfaces, "i18n" etc.