Right default directory for charts

[vromero]

In PackageMojo.java and in the documentation we can see that chartContentsUri by default points to file:${project.basedir}/src/helm/charts/${project.artifactId}/.

However, the standard directory layout of maven would suggest that the default directory should be file:${project.basedir}/src/main/helm/charts/${project.artifactId}/. Specifically the paragraphs:

Within artifact producing source directories (ie. main and test), there is one directory for the language java (under which the normal package hierarchy exists), and one for resources (the structure which is copied to the target classpath given the default resource definition).

If there are other contributing sources to the artifact build, they would be under other subdirectories: for example src/main/antlr would contain Antlr grammar definition files.