Removed resourceProviders argument(unused).
Other arguments marked as optional.
Added argument to set whether use yang files from dependencies or not.
Added packaging of yang files from project to META-INF.
Added additionalConfiguration argument for code generators.
Yang-maven-plugin SPI, ResourceProvider interface removed since
it was unused. Code generator interface improved.
YangParserImpl API changed to provide a map<File, Module>. Users will
know which module belongs to which file and can utilize this information
when parsing yang files from multiple sources. Yang-maven-plugin needs
this information since it parses yang files from project as well as its
dependencies.
Change-Id: I15c53df59c4104793e023ad3686b031ce0ba8cd3
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>