Java 7 deprecation

[pomadchin]

• Java 8 support only
• Removed joda time
• Removed de.javakaffe
• Test on Landsat EMR demo

[pomadchin]

Still need to double check following serializers usage (from de.javakaffe):

kryo.register( Arrays.asList( "" ).getClass, new ArraysAsListSerializer )       
kryo.register( Collections.EMPTY_LIST.getClass, new CollectionsEmptyListSerializer() )      
kryo.register( Collections.EMPTY_MAP.getClass, new CollectionsEmptyMapSerializer() )        
kryo.register( Collections.EMPTY_SET.getClass, new CollectionsEmptySetSerializer() )        
kryo.register( Collections.singletonList( "" ).getClass, new CollectionsSingletonListSerializer )       
kryo.register( Collections.singleton( "" ).getClass, new CollectionsSingletonSetSerializer )        
kryo.register( Collections.singletonMap( "", "" ).getClass, new CollectionsSingletonMapSerializer )

UnmodifiableCollectionsSerializer.registerSerializers( kryo )       
SynchronizedCollectionsSerializer.registerSerializers( kryo )

[lossyrob]

Is this WIP because of the double checking?

[pomadchin]

@lossyrob can be merged (: I use this branch for other prs locally