moved code to takari-plugin-testing module

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
moved code to takari-plugin-testing module

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
automatically resolve maven versions used by integration tests WIP

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
introduced takari-plugin-integration-testing* convenience poms

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
updated readme

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>