The "Convert to Nuxeo Project" action should preserve existing intra-workspace project dependencies

Step to reproduce:

• create two projects A and B with pom.xml files and set the build of B to depend on a class in A
• build the projects using maven to check that it works
• generate the .project / .classpath files using "mvn eclipse:eclipse"
• import the project into eclipse
• select A and B in the project explorer view in eclipse and right click on "Nuxeo > Convert to Nuxeo project" (or to "Nuxeo Seam project").

Expected: the build should still be fine with the depedency from B to A preserved as a "Project" dependency when introspectiong the "build path" in the .classpath.

Observerd: the dependency from B to A is dropped and the build of the B project is hence broken.