Consequence type gbpa

- All parsers from cellbase-build now extend CellbaseParser
- Organized CelllBaseMain
- Organized serializers: all parsers use now CellBaseSerializers from cellbase-core; MongoDbSerializer now extends DefaultJsonSerializer
- Added new parsers: cosmic, gwas, cadd, disgenet, geneexpressionatlas, wig
- Removed unused parsers: BioPaxPathWayParser, RegulatoryRegionParserOld, VariationParserOld y VariationParser_old
- Added beans used on those parsers (cellbase-build/src/main/java/org/opencb/cellbase/build/transform/formats package)
- Added groovy tests for new parsers, resources used by them and dependencies for those tests to pom.xml (spockframework, cglib and gmaven-plugin)
- Added "Ignore" to some failing tests (VariantEffectMongoDBLoaderTest and GenomeSequenceUtilsTest)