Multiple Entries in MANIFEST.MF 'Require-Bundle' when required bundle is already listed
When generating the CINCO Product, with for example the 'Generatable' MetaPlugin, multiple times the the required bundle 'de.jabc.cinco.meta.plugin.generator.runtime' is listed multiple times in the 'Require-Bundle' section of the MANIFEST.MF of the main project, due to a lack of check for existing entries in the ProjectCreator class.