Take 2: Refactor hoodie-common and create right abstractions for Hoodie Storage V2.0

- Refactored timelines to be a single timeline for all active events and one for archived events. CommitTimeline and other timelines can be inferred by applying a filter on the activeTimelime
- Introduced HoodieInstant to abstract different types of action, commit time and if isInFlight
- Implemented other review comments

hoodie-hadoop-mr/pom.xml

@@ -79,6 +79,11 @@
       <groupId>org.apache.avro</groupId>
       <artifactId>avro</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.esotericsoftware</groupId>
+      <artifactId>kryo</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>